Questions from Genetics

Q: Describe the molecular process of X-chromosome inactivation. This description

Describe the molecular process of X-chromosome inactivation. This description should include the three phases of inactivation and the role of the Xic. Explain what happens to the X chromosomes during...

Q: On rare occasions, a human male is born who is somewhat

On rare occasions, a human male is born who is somewhat feminized compared with other males. Microscopic examination of the cells of one such individual revealed that he has a single Barr body in each...

Q: How many Barr bodies would you expect to find in humans with

How many Barr bodies would you expect to find in humans with the following abnormal compositions of sex chromosomes? A. XXY B. XYY C. XXX D. X0 (a person with just a single X chromosome)

Q: Describe the inheritance pattern of maternal effect genes. Explain how the

Describe the inheritance pattern of maternal effect genes. Explain how the maternal effect occurs at the cellular level. What are the expected functional roles of the proteins that are encoded by mate...

Q: A maternal effect gene exists in a dominant N (functional)

A maternal effect gene exists in a dominant N (functional) allele and a recessive n (nonfunctional) allele. What would be the ratios of genotypes and phenotypes for the offspring of the following cros...

Q: A Drosophila embryo dies during early embryogenesis due to a recessive maternal

A Drosophila embryo dies during early embryogenesis due to a recessive maternal effect allele called bicoid−. The wild-type allele is designated bicoid+. What are the genotypes and phenotypes of the e...

Q: For Mendelian inheritance, the nuclear genotype (i.e.,

For Mendelian inheritance, the nuclear genotype (i.e., the alleles found on chromosomes in the cell nucleus) directly influences an offspring’s traits. In contrast, for non-Mendelian inheritance patte...

Q: Suppose a maternal effect gene exists as a functional dominant allele and

Suppose a maternal effect gene exists as a functional dominant allele and a nonfunctional recessive allele. A mother who is phenotypically abnormal produces all normal offspring. Explain the genotype...

Q: Where are the two ends of a kinetochore microtubule?

Where are the two ends of a kinetochore microtubule?

Q: Suppose that a gene affects the anterior morphology in house flies and

Suppose that a gene affects the anterior morphology in house flies and is inherited as a maternal effect gene. The gene exists in a functional allele, H, and a recessive nonfunctional allele, h, which...