AP _Unit 5_ Meiosis and Genetics_ GENETICS

Front

What is colorblindness and how is it inherited?

Back

Colorblindness is a genetic condition that affects the ability to see colors. It is inherited in an x-linked recessive manner.

Front

What is the genotype of a colorblind male?

Back

X^hY

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a phenotype that is a blend of the two.

Front

What is codominance?

Back

Codominance is a genetic situation where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits.

Front

What color flowers result from crossing a red flower (RR) with a white flower (rr) in snapdragons?

Back

Pink (Rr) flowers result from this cross due to incomplete dominance.

Front

What does it mean if a trait is x-linked recessive?

Back

It means that the gene responsible for the trait is located on the X chromosome and that two copies of the allele are needed for females to express the trait, while males need only one.

Front

What is the expected percentage of female offspring that will be carriers for a recessive disease if one parent is a carrier?

Back

50% of the female offspring will be carriers.

Front

What is the principle of independent assortment?

Back

The principle of independent assortment states that alleles for different traits are distributed to gametes independently of one another.

Front

What is the significance of crossing over in genetics?

Back

Crossing over is the exchange of genetic material between homologous chromosomes during meiosis, leading to genetic variation in offspring.

Front

What does it mean for genes to be located on the same chromosome?

Back

It means that the genes are physically close to each other on the same chromosome, which can affect how they are inherited together.