A female has a family history of Duchenne muscular dystrophy, a recessive sex- linked condition that is carried on the X chromosome. She does not have the disease. Her brqther, sister, and father all have the disease, while her mother does not. She recently married a male with no family history of the disease. If they decide to have children, what percentage of their sons will have the disease? * O 0% O 25% O 50% O 100%

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A: Color blindness is a genetic disorder which is caused by the inheritance of the mutated genes. The…

Q: A dominant allele, XE, carried on the X chromosome causes the formation of faulty tooth enamel,…

A: The genotype of a child is dependant on the genotype of the parents. A dominant allele can manifest…

Q: A woman who is phenotypically normal is married to a phenotypically normal man. Her maternal…

A: Introduction X-linked Inheritance Means That The Gene Causing The Trait Or The Disorder Is Located…

Q: In man, muscular dystrophy is a condition in which the muscles waste away during early life and may…

A: Muscular dystrophy is a disease that involve a progressive loss of muscle mass and consequent loss…

Q: In humans color vision is X-linked, the gene for color vision is located on the X chromosome but is…

A: Colour blindness is a X linked Recessive disorder in which presence  of gene n on X chromosome is…

Q: A boy has dimples (dominant trait of autosomal gene D) and is left-handed (recessive trait of…

A: Traits like skin,hair,eye color are determined through genes. Every gene is composed of two alleles:…

Q: Proband Sex-linked Brackets Arabic numerals Heterosis III E E Depict the birth order in a generation…

A: An illustration of the biological connections between a creature and its predecessors is called a…

Q: The male is heterozygous for Huntington’s disease and homozygous dominant for Tay-Sachs. The female…

A: Male = Hh TT Female = hh Tt

Q: Red-green color blindness in humans is due to an X- linked recessive gene. thin

A: Red-green color blindness is the most common variety of color deficiency in humans. It happens to…

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A: All mammalian organisms exhibit sexual dimorphism. It means that there is the presence of a male and…

Q: If a father is affected by an X-linked dominant condition and the mother is normal, what is the…

A: When the gene responsible for the occurrence of a trait or disorder is present on one of the sex…

Q: A type of red-green colorblindness is inherited recessively on the X chromosome. A woman   who is…

A: Color blindness is sex-linked recessive disorder. A person is said to be color blind if he is not…

Q: A child has a genotype AA, what possible combination of parental genotypes could have produced this…

A: Genotype is the appearance of genes of an individual. Each character in the gene is referred as…

Q: Greg and Susan have Nail- Patella syndrome (NPS). NPS is an autosomal dominant. Greg has a blood in…

A: Introduction  The nails, knees, elbows, and pelvis are abnormal in people with nail-patella…

Q: Color-blindness is an X-linked recessive disorder. Under what circumstances will this condition…

A:

Q: Albinism is an autosomal recessive condition characterized by absence of melanin pigment from the…

A: Albinism is a group of genetic disorders characterized by a lack of melanin, the pigment that gives…

Q: A woman heterzygous for color blindness (an X-linked recessive allele) marries a man with normal…

A: Color blindness is inherited as a recessive trait on the X chromosome. This is known as X-linked…

Q: Tightly curled hair is caused by a dominant autosomal gene in humans. If a heterozygous curly-haired…

A: The major traits of Autosomal inheritance is : trait should not skip generations as well as the…

Q: Achondroplasia, is characterized by difficulty converting cartilage to bone and thus results in…

A: Color blind is X linked recessive trait.  C = color blind c = normal XCXC = normal female  XCXc =…

Q: Piebaldism is a skin condition that causes an infant to be born with white birthmarks due to a…

A: It is an autosomal dominant genetic disorder. It is mainly due to the absence of melanocytes of the…

Q: healthy/non-carrier woman, what is the probability of them having 4 healthy children? ther suffered…

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Q: A patient has two parents with Huntington's disease. They may not have inherited this autosomal…

A: The Huntington's disease is a very rare condition and is an inherited disease which results in…

Q: In which parent the chromosomal mutation occurred. Father or Mother At what stage in meiosis (I or…

A: The genotype of the offsprings are depends on the genotype of both the parents because half of the…

Q: Huntington's disease is caused by a autosomal dominant that is lethal in embryos in the homozygous…

A: Alleles are the alternative forms of a gene that are located on the same locus of a homologous…

Q: In humans, red-green color-blindness is a recessive X-linked trait. A man with red-green color-…

A: Color blindness refers to a reduced capacity to see color or color distinctions. Color blindness is…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.