Genetics and Inheritance Patterns

In guinea pigs, the allele for hairy (H) is dominant over the allele for hairless (h). If a hairless guinea pig is crossed with a heterozygous guinea pig, what is the probability of their offspring being hairless?

• 0%

• 25%

• 50%

• 75%

In cats, the allele for hairy (H) is dominant over hairless (h), and the allele for sink-loving (S) is dominant over non-sink-loving (s). What is the genotype of a cat that is heterozygous for both traits?

• HHSS

• HhSs

• hhss

• HHSs

In snapdragons, red flowers (RR) and white flowers (rr) show incomplete dominance, resulting in pink flowers (Rr). If two pink snapdragons are crossed, what is the expected phenotypic ratio of their offspring?

• 1 red : 2 pink : 1 white

• 3 red : 1 white

• 1 red : 1 pink : 1 white

• All pink

In a certain type of chicken, the genotype BB results in black feathers, WW results in white feathers, and BW results in black and white speckled feathers. What type of inheritance pattern does this demonstrate?

• Complete Dominance

• Incomplete Dominance

• Codominance

• Sex-linked Inheritance

What is the phenotypic ratio of offspring from a cross between a black chicken (BB) and a black and white speckled chicken (BW)?

• 1 Black : 1 Black/White Speckled

• 2 Black : 1 Black/White Speckled

• 1 Black : 2 Black/White Speckled

• All Black/White Speckled

If one parent has heterozygous Type B blood (I^B i) and the other has heterozygous Type A blood (I^A i), what is the percent chance their child will have Type O blood?

• 0%

• 25%

• 50%

• 75%

Hemophilia is a recessive, sex-linked disorder. Which female genotype would result in hemophilia?

• X^H X^H

• X^H X^h

• X^h X^h

• X^H Y

In a standard pedigree chart, what shape represents a female?

• Square

• Circle

• Diamond

• Triangle