Genetics Unit Review

Front

What is polygenic inheritance?

Back

Polygenic inheritance is a type of inheritance where multiple genes influence a trait, resulting in a range of phenotypes, such as skin color and height.

Front

What are polygenic traits?

Back

Polygenic traits are characteristics that are determined by multiple genes, leading to a continuous range of traits.

Front

What is the probability of obtaining a short pea plant from a cross of two tall pea plants (Tt x Tt)?

Back

25%.

Front

Why is colorblindness more common in males than in females?

Back

Colorblindness is more common in males because the allele for colorblindness is recessive and located on the X chromosome.

Front

What genotype represents a male with normal vision in the context of colorblindness?

Back

X^N Y.

Front

Define codominance.

Back

Codominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

Front

What is incomplete dominance?

Back

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

Front

What are multiple alleles?

Back

Multiple alleles refer to the presence of more than two alleles for a genetic trait within a population.

Front

Explain linked genes.

Back

Linked genes are genes that are located close to each other on the same chromosome and tend to be inherited together.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.