Q: Explain briefly following: 1. Alleles 2. Sex links 3.lethal genes 4. Sex limited and sex…
A: Genetics is the branch of science that deals with study of inheritance. Inheritance is the…
Q: Which of the following traits are complete dominance, incomplete dominance, X-linked, or sex-linked?…
A: If a dominant character is expressed in heterozygous condition then that shows complete dominance.…
Q: A couple wish to have children, but the father has an X-linkedrecessive trait. Assuming that the…
A: An organism has phenotype and genotype. Phenotype is the observable characteristics and genotype is…
Q: Will couples be able to select embryos with certain genes encoding desirable traits for height,…
A: Reproduction is the phenomenon of producing offspring from the parent. The reproduction can be…
Q: 3. Black hair is homozygous dominant. Brown hair is heterozygous. Blonde hair is homozygous…
A: Incomplete dominance is a type of inheritance is characterized by the blending of traits of the…
Q: Two people heterozygous for Tay-Sachs (recessive disease) have two children who are both normal.…
A: Tay-Sachs is a genetic disorder. It is inherited only when both parents carry the gene for…
Q: A woman and her spouse both show the normal phenotype for pigmentation, but both had one parent who…
A: Alleles at the alternative forms of a gene that are located on the same locus of a homologous…
Q: What is the relationship between non-disjunction, changes in chromosome number and miscarriage? Why…
A: Chromosome abnormalities are of 2 types viz. numerical, where an individual has abnormal number of…
Q: How Are Sex and Sex- Linked Traits Inherited?
A: The traits in which the genes are located on either of the two sex chromosomes are called sex-linked…
Q: Which of the following can arise from a zygotic mitotic problem in an individual with a normal XY…
A: Following condition arised due to Error in zygote mitosis in an individual with XY genotype.
Q: Baldness is a sex-linked trait. What parental genotypes could produce a bald woman? *use H = normal…
A: Sex linked traits are those whose genes are located on sex chromosomes.
Q: Assume that a trait is determined by an X-linked dominant gene. Ifthe mother exhibits the trait but…
A: X-linked dominant disorders can be described as abnormalities that occur due to mutations in the…
Q: Can a woman who is affected by an X-linked dominant disorder have a child who is not affected? Why…
A: In physiology, X-linked dominant disorder is defined as genetic disorder occurs due to X chromosome…
Q: An individual that is genetically male develops as a female. Is this individual more or less likely…
A: The males have one X chromosome and one Y chromosome and the females have a pair of X chromosomes.…
Q: Discuss the differences among sex-influenced, sex-limited, andsex-linked inheritance. Give examples.
A: Ans: The inheritance is referred to as the process in which one individual or class of individual…
Q: 1. A man and a woman got married and decided to have 5 children. a. What is the probability that the…
A: a- probability that couple have 3 girls and 2 boys out of 5 childrens will be e 5/16. b- Probability…
Q: A man has six fingers on each hand and six toes on each foot. His wife and their daughter have the…
A: Usually, our phenotypes are controlled by the genes, sometime only one gene can determine the…
Q: What is the probability that a color-blind woman who marries a man with normal vision will have a…
A: Color blindness is a condition which is passed on genetically. In this condition it is difficult for…
Q: In humans,curly hair is dominant over straight hair.A woman heterozygous for hair marries a man with…
A: Genetic conditions are transferred from parent to offspring. Sometimes, they get expressed in the…
Q: How are sex-linked traits inherited? Give an example.
A: The sex chromosome of the male and female is responsible for the sex-linked inheritance. The…
Q: Do males and females show equal chances of inheriting the trait? Why or why not
A: There are two facets to this question which make out two completely different answers. Both the…
Q: A pregnant woman is carrying a triplet inside her womb. They want to determine the number of boys or…
A: Sex determination Sex determination is the biological systems that determines the sex of an…
Q: Would a person with X0 genotype have ovaries, testes, or neither?
A: XO is a genetic condition known as Turner syndrome , in this condition female partially or complete…
Q: A man who is a dwarf due to achondroplasia and has normal vision marries a color-blind woman of…
A: Autosomal dominant It is a type of inheritance in which the gene is located on the autosomal…
Q: How can sex limited traits affect an individual?
A: Genes of these sex influenced characters are also present on autosomes but they are influenced…
Q: In a family of five children, what is the probability that four are girls and one is a boy? 1/8 5/32…
A: Probability is the branch of mathematics concerning numerical descriptions of how likely an event is…
Q: dimples marries a healthy woman with no dimples. Their four children have the following phenotypes.…
A: Suppose, allele D is responsible for dimples (dominant) and allele d is normal. Allele F is normal…
Q: Explain the difference between X-linked recessive traits and X-linked dominant traits. What are the…
A: Some diseases are inherited genetically. These diseases are either autosomal or sex-linked. Genes of…
Q: Dimples are dominant over no dimples. A mother that does not have dimples marries a man. Together…
A: Given that: Dimples are dominant over no dimples. Let us assume that D codes for dimples and d codes…
Q: how is it possible for a person who inherited XY gene to have female phenotype?
A: There are 46 chromosomes in each cell of the human body. The sex chromosomes, X and Y, are two of…
Q: A man with AB blood type marries a woman with O blood type. What is the expected phenotypes (use…
A: Allele for blood group AB are IAIB And allele for blood group O are ii When we cross man with AB…
Q: If a man has 6 fingers on each hand and 6 toes on each foot and his wife and daughter have the…
A: Polydactyl is a condition when a baby born with an extra finger in their feet or hands. It is an…
Q: 8. If two parents are heterozygous for a genetically inherited dominant trait, what is the…
A: Dominant trait is always expressed whether it is present in heterozygous or homozygous condition.…
Q: Muscular dystrophy is a sex-linked recessive disorder that causes the muscles to slowly weaken.…
A: A group of genetic diseases that cause progressive weakness and loss of muscle mass is known as…
Q: Dominant Traits. A couple is going to have a baby. They are concerned about Huntington's Diseases,…
A: The Huntington’s disease is observed in person with a copy of allele H.The mother is not affected…
Q: A couple wants to have 6 children. The mother is heterozygous for the sex-linked recessive trait for…
A: Color blindness is a sex-linked recessive disorder. The gene accountable for this disorder is…
Q: A male affected with an X-linked dominant trait will have what proportion of offspring affected with…
A: Genetics is the branch of biology that deals with the study of genes, their variation, and heredity…
Q: A man has six fingers on each hand and six toes on each foot.His wife and their daughter have the…
A: According to the Mendelian Laws dominance, independent assortment, and segregation, various…
Q: why is the answer 15% do we assume autosomal dominant translates to heterozygous for the trait…
A: Autosomal dominant inheritance is a way a genetic trait can be passed down from the parent to their…
Q: Q1
A: Let the gene be RB and rb. Mother is homozygous dominant RBRB- X RBXRB Father is normal- XrbY X…
Q: A couple (Aa x Aa) decides to have a child, what is the probability that their first child is female…
A: "Genetics" is the study of the functioning and main codes of variation and heredity. Inheritance is…
Q: What causes most of the phenotypic abnormalities in someone with Down's Syndrome? A) They have…
A: Aneuploidy is the condition in which abnormal number of chromosomes are seen in the cell.Normally…
Q: Where are sex linked genes predominantly
A: Chromosomes are thread-like structures present within the nucleus of both animal and plant cells.…
Q: In Sex-Limited and Sex-Influenced Inheritance, an Individual’s Gender Influences the Phenotype. How…
A: Genetic is the branch of science that deals with genetic material like genome, genes, DNA, and…
Q: Ocular albinism is a sex-linked recessive disease carried on the X chromosome. A female carrier…
A: Ocular albinism sex linked recessive disease. The mother is carrier. The genotype of mother is X^O…
Q: What is a Sex limited traits and Sex influence traits what are their differences?
A: Inheritance can be defined as passing on the traits from generation to generation. The traits can be…
Q: If a woman is heterozygous for neurofibromatosis (a dominant disorder) and produces with a…
A: Neurofibromatosis (NF1) is hereditary disease (which can be passed on from one generation to…
Q: Huntington's disease is a genetic disorder in humans which is controlled by a dominant gene. If one…
A: Huntington's disease is an inherited genetic disorder that is passed on as an autosomal dominant…
Q: Huntington disease is a rare dominant trait that causes neurodegeneration later in life. A man in…
A: Huntington disease This is a genetic disorder in which the human nerve cells present in the brain…
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- Six months pregnant, an expectant mother had a routineultrasound that showed that the limbs of the fetus wereunusually short. Her physician suspected that the babymight have a genetic form of dwarfism called achondroplasia,an autosomal dominant trait occurring with a frequency of about1 in 27,000 births. The parents were directed to a genetic counselorto discuss this diagnosis. In the conference, they learnedthat achondroplasia is caused by a mutant allele. Sometimes itis passed from one generation to another, but in 80 percent ofall cases it is the result of a spontaneous mutation that arisesin a gamete of one of the parents. They also learned that mostchildren with achondroplasia have normal intelligence and a normallife span. What information would be most relevant to concluding whichof the two mutation origins, inherited or new, most likelypertains in this case? How does this conclusion impact on thiscouple’s decision to have more children?Huntington’s disease, is an incurable neurodegenerative genetic disorder that affectsmuscle coordination and some cognitive functions, typically becoming noticeable inmiddle age. It results from an autosomal dominant gene (H) and there are no carriers ofthe disease. Two parents with Huntington’s disease have an affected child. What is theprobability that their next child will be an unaffected girl if they are not double-dominant?Bloom syndrome is an autosomal recessive disease that exhibitshaploinsufficiency. A recent survey showed that people heterozygousfor mutations at the BLM locus are at increased risk of colon cancer.Suppose you are a genetic counselor. A young woman is referred to youwhose mother has Bloom syndrome; the young woman’s father has nofamily history of Bloom syndrome. The young woman asks whether sheis likely to experience any other health problems associated with herfamily history of Bloom syndrome. What advice would you give her?
- a) Identify and describe 5 different types of genetic inheritance.(b) In humans, glucose-6-phosphate dehydrogenase deficiency is a recessive X-linkedtrait. Describe the inheritance of this disease, including an example of the possibleoutcomes of:(i) An affected mother and an unaffected father having children. (ii) An affected father and a homozygous unaffected mother having childrenGlucose-6-phosphate dehydrogenase deficiency/G6PDD (g) is an X-linked recessive conditionwherein the red blood cells of affected individuals undergo premature hemolysis. Fragile X syndrome(F), on the other hand, is an X-linked dominant mutation characterized by a mild to moderateintellectual disability. Amelogenesis imperfecta (A) is a congenital disorder affecting the formation ofthe teeth enamel making affected individuals at higher risk for dental cavities and related problems.Only male offspring inherit this condition. Jane is heterozygous for both X-linked traits like her mother. Her father is normal for both X-linked traits. James has a mother who suffers from G6PDD but not from fragile X-syndrome. His fatherdoes not exhibit any X-linked disorder but has amelogenesis imperfecta. A. What are the genotypes of the following: Jane: ______________________ James: ______________________Jane’s mother: _________________ James’ mother: ________________Jane’s father: __________________…How can a female carrier of an X-linked recessive disorder have a daughter who is affected?
- Theodor Boveri predicted that malignancies would often be associated with chromosomal mutation. What lines of evidence substantiate this prediction?Why are X-linked recessive disorders never passedfrom a father to a son?What is the most common symptom in a genetic disorder and why? Do all people exhibit this symptom of a genetic disorder?
- Neural Tube Defects (NTDs) are one of the most severe congenital malformations. A study was conducted to determine whether supplementation with folic acid or a mixture of seven other vitamins (A, D, B1, B2, B6, C, and nicotinamide) around the time of conception could prevent neural tube defects. A total of 1817 women at high risk of having a pregnancy with a neural tube defect (because of a previous affected pregnancy) were allocated at random to one of four groups: 1) folic acid; 2) other vitamins; 3) both; 4) neither. 1195 had a completed pregnancy; 27 of these had a known neural tube defect, 6 in the folic acid groups and 21 in the two other groups. This resulted in a risk ratio= 0.28. Based on the results of the study, which of the following is an appropriate conclusion? a)There is no difference in the effect of folic acid on NTDs b) None of these c) Folic acid increases risk of NTDs d) Folic acid is protective against NTDsNeural Tube Defects (NTDs) are one of the most severe congenital malformations. A study was conducted to determine whether supplementation with folic acid or a mixture of seven other vitamins (A, D, B1, B2, B6, C, and nicotinamide) around the time of conception could prevent neural tube defects. A total of 1817 women at high risk of having a pregnancy with a neural tube defect (because of a previous affected pregnancy) were allocated at random to one of four groups: 1) folic acid; 2) other vitamins; 3) both; 4) neither. 1195 had a completed pregnancy; 27 of these had a known neural tube defect, 6 in the folic acid groups and 21 in the two other groups. This resulted in a risk ratio= 0.28. What type of study design is this? a) Case-control b) Randomized controlled trial c) Prospective cohort d) Retrospective cohortPseudohypertrophic muscular dystrophy is an inheriteddisorder that causes gradual deterioration of the muscles. It isseen almost exclusively in boys born to apparently unaffectedparents and usually results in death in the early teens. Isthis disorder caused by a dominant or a recessive allele?Is its inheritance sex-linked or autosomal? How do youknow? Explain why this disorder is almost never seen in girls.
