Genetics and Inheritance Patterns

What are the expected phenotypic ratios of offspring from a cross between a hairless guinea pig and a heterozygous hairy guinea pig?

• 1 hairy : 1 hairless

• 3 hairy : 1 hairless

• 1 homozygous dominant : 1 heterozygous : 1 homozygous recessive

• All hairy

When two cats, both heterozygous for hair (Hh) and sink-loving (Ss), are crossed, what is the expected phenotypic ratio of their offspring?

• 9 hairy, sink-loving : 3 hairy, non-sink-loving : 3 hairless, sink-loving : 1 hairless, non-sink-loving

• 1:1:1:1

• 3 hairy, sink-loving : 1 hairless, non-sink-loving

• 9:3:3:1 for genotypes

In snapdragons, red flowers (RR) and white flowers (rr) exhibit 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

• All pink

• 1 red : 1 pink : 1 white

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 is this an example of?

• Complete dominance

• Incomplete dominance

• Codominance

• Polygenic inheritance

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

• 1 Black : 1 Black/White Speckled

• 2 Black : 2 Black/White Speckled

• 3 Black : 1 Black/White Speckled

• 1 Black : 2 Black/White Speckled : 1 White

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

• 0%

• 25%

• 50%

• 75%

How is the genotype for a male with hemophilia written, given that hemophilia is a recessive, sex-linked disorder and 'H' represents no hemophilia while 'h' represents hemophilia?

• X^H Y

• X^h X^h

• X^h Y

• X^H X^h

In a pedigree tracking an autosomal recessive trait, if individual I-1 (female) does not express the trait but has an offspring (II-2, female) who does, what is the genotype of individual I-1?

• Homozygous dominant (EE)

• Heterozygous (Ee)

• Homozygous recessive (ee)

• Cannot be determined without further information.