A women is heterozygous, Aa, for classic albinism and this gene maps to chromosome 11, and is a carrier for haemophilia, an X-linked trait (H/h). Provide a diagram of chromosomes 11 and the sexchromosomes (show the alleles associated with albinism and haemophilia) in the cells involved with normal oogenesis for this female. Start with the oogonium and end with the mature ovum; you can ignore all polar bodies. Your diagrams should show the chromatids clearly and all cells must be labelled. Indicatethe total number of chromosomes and chromatids for each cell stage.

Q: The picture below represents a G1 cell from a newly discovered species that uses the X/Y sex…

A: The cell is in G1 phase and hence it undergoes the S phase to duplicate the DNA. Thus, homologous…

Q: Amelogenesis imperfecta (AI) is a disorder of faulty tooth enamel formation. It is inherited in an…

A: Amelogenesis imperfecta A faulty tooth enamel formation. Dominant traits Autosomal dominant allele…

Q: cance of color blindness in humans is due to a recessive gene located on the X chromosome X linked).…

A: Mother     ×      father            XXc                  XcY Progeny -      X Xc Xc XXc…

Q: X-linked ichthyosis is an X-linked recessive trait that manifests in part as dry, scaly skin…

A: If one allele is missing it is hemizygous. Heterozygous is the presence of two different alleles at…

Q: Cross C: Homozygote wild type flies (+/+) were crossed with white eye flies. for the F1 and F2…

A:

Q: During oogenesis, nondisjunction of X chromosome occurred in meiosis I. If the resulting egg unites…

A: Non disjunction is the failure of chromosomes / chromatids to separate during Anaphase. In Meiosis…

Q: Amelogenesis imperfecta (AI) is a disorder of faulty tooth enamel formation. It is inherited in an…

A: The trait shown is inherited both autosomal dominant and X-linked; the presence of the dominant gene…

Q: Hemophilia results from a sex-linked gene. The disease is most common in males, but the hemophilia…

A:

Q: Given that the gene for the color-blind condition is recessive and X-linked. You have a female with…

A: Maternal parent has a nondisjunction at Meiosis1 or 2

Q: A female is heterozygous for an X-linked gene.  If nondisjunction happens for the sex chromosomes…

A: Introduction :  Aneuploidy is the term used to describe a cell that has an abnormally high/low…

Q: A variety of abnormalities in the numbers of sex chromosomes exist because of nondisjunction during…

A:

Q: For a male with a genotype of AaBb Draw a primary spermatocyte which has just entered diakinesis be…

A: Primary spermatocyte : During spermatogenesis the male germ cells called spermatogonial cells divide…

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: A report in the New England Journal of Medicine (Seminar et al. 2003) relayed a discovery about a…

A: Suppose, we have two gene a and A  a is carried the disease  Aa- carrier  AA- normal aa- affected…

Q: identify and label the chromosomes number (1-22). also, identify if it is male or female by labeling…

A: A karyotype is a preparation of the entire complement of metaphase chromosomes found in a species or…

Q: Although triple-X human females typically have normal offspring, what kinds of gametes, with respect…

A: Introduction In humans, the X chromosome is one of two sex chromosomes, the other is the Y…

Q: A mouse sperm cells has the genotype a b c d e it fertilizes an egg with the genotype a b c d e a.…

A: The combination of genetic material from a sperm and an egg during fertilization is an important…

Q: Explain why genetic disorders caused by recessive alleles of X-linked genes appear more frequently…

A: In humans and other mammals, biological sex is determined by a pair of sex chromosomes: XY in males…

Q: A color-blind woman with Turner syndrome (XO) has a father who is color blind. Given that the gene…

A: Given that the gene for the color-blind condition is recessive and X-linked and a color-blind woman…

Q: Draw a Punnett square for the dihybrid cross. There are two known alleles of gene occupying a…

A: Dihybrid cross involves two genes in a cross. That's why the two traits are involved in this cross.

Q: Draw relevant schemes of karyotypes for a female with a classical Down syndrome (trisomy 21),…

A: Part-1) A female with down syndrome would typically have 47 chromosomes instead of the usual 46.…

Q: A family has an X-linked dominant form of congenital generalizedhypertrichosis (excessive…

A: Genes are the functional unit of DNA. It contains information that is transferred from one…

Q: If the mutation occurred in Jonathan's somatic cells when he was in his 30's, what type of alleles…

A: A neurodegenerative condition that is primarily inherited is Huntington's disease (HD), also known…

Q: e (ebony) gene is an autosomal gene in Drosophila melanogaster. A male ophila has the genotype of…

A: Gametes produced will be of four types   I.e 2n where n is the number of heterozygous allele. Here…

Q: Wilma and Wally have one male child who has been diagnosed withDuchenne muscular dystrophy, an…

A: Duchenne muscular dystrophy is a medical condition of muscular dystrophy which is caused by DMD gene…

Q: Amelogenesis imperfecta (AI) is a disorder of faulty tooth enamel formation. It is inherited in an…

A: Genes are the unit of inheritance that transfers traits from one generation to another. Genes coding…

Q: Please answer question (a) (b) and (e)

A: Crossing over increases variations.

Q: Explain why a person with Klinefelter Syndrome (XXY) still exhibits abnormal phenotypes despite the…

A: The human sex is determined at the time of fertilization in the fallopian tube of the female…

Q: Explain how the X and Y chromosomes are able to pair together in meiosis as homologous chromosomes.…

A: Meiosis is the phenomenon that occurs in any life cycle that involves the process of sexual…

Q: Assuming sexual reproduction and that no mutations have occurred. Please draw one possible genotype…

A: Genotype It is a description of our DNA's pair of alleles. The genotype of an offspring is…

Q: Amelogenesis imperfecta (AI) is a disorder of faulty tooth enamel formation. It is inherited in an…

A: Amelogenesis imperfecta (AI) is a disorder of faulty tooth enamel formation. It is inherited in an…

Q: Draw a Punnett square for the dihybrid cross described below (it is the same story as given for…

A: X linked characters are those where the the gene in question is located on the X chromosome. Females…

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: A primary spermatocyte has the genotype AaBbee. The A and B loci are linked in cis configuration on…

A: Meiosis is also known as double division that occurs in a diploid cell and gives rise to four…

Q: Analyze the karyotype shown. Indicate if it is a chromosomal male or achromosomal female. If the…

A: Most higher animals show sexual dimorphism so, a individual can be either male or female. In…

Q: all of his sons   all of his daughters   half of his daughters and half of his sons   half of his…

A: X- inactivation or lyonization is a process in which one of the X- chromosome is inactivated in…

Q: To define the adavantage and disadvantage of a compact chromosomal structure.

A: Chromatin A mixture of protein and DNA together makes up the chromatin. This chromatin is a…

Q: Sex Determination (female genotype XX and male genotype XY) A. What fraction of human offspring…

A: A sex-determination system is a biological system that controls how an organism's sexual…

Q: Duchenne muscular dystrophy (DMD) is caused bya recessive mutant allele of an X-linked gene…

A: Duchenne muscular dystrophy (DMD) is a progressive form of muscular dystrophy that results in muscle…

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.