Comb shape in chickens also involves the interaction of two genes, but the F2 generation shows a typical 9:3:3:1 Mendelian ratio. How does this work?
What will be an ideal response?
A dominant allele present in one gene in combination with the homozygous recessive state in the other gene produces one of two phenotypes (rose or pea). Both dominant alleles present produce a third phenotype (walnut), and both homozygous recessives produce a fourth phenotype (single). The ratio is 9 walnut : 3 rose : 3 pea : 1 single.
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Knowledge of an organism's genome sequence yields important clues to how an organism functions and its evolutionary history
Indicate whether the statement is true or false.
The shape of a virus is determined by
A. its DNA. B. its RNA. C. its envelope. D. its host. E. its coat protein organization.
What antibody class is the most common class of antibody produced in the primary response to an antigen?
A) IgM B) IgE C) IgG D) IgD E) IgA
The lacZ gene encodes
A. ampicillin-resistance protein. B. aromatase. C. glucose dehydrogenase. D. lactose. E. ?-galactosidase.