Complex Inheritance

Front

What is the term for having two recessive alleles for a trait?

Back

Homozygous recessive

Front

What is the expected phenotype ratio in the offspring of a cross between two heterozygous individuals for a trait showing incomplete dominance?

Back

1:2:1

Front

In incomplete dominance, a person with a heterozygous genotype has:

Back

a blending of the dominant and recessive phenotypes

Front

This is an example of ___________? (incomplete dominance, codominance, multiple alleles, polygenic inheritance)

Back

Incomplete dominance

Front

Does this pedigree show a dominant or recessive trait?

Back

Recessive

Front

Define incomplete dominance.

Back

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

Front

What is codominance?

Back

A genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous has two identical alleles for a trait, while heterozygous has two different alleles.

Front

What is polygenic inheritance?

Back

A type of inheritance where multiple genes influence a trait, leading to a continuous range of phenotypes.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.