AP Biology Unit 5 Heredity

Front

What is complete dominance in genetics?

Back

Complete dominance occurs when the phenotype of the heterozygote is indistinguishable from that of the dominant homozygote.

Front

What is the phenotypic ratio in a monohybrid cross of complete dominance?

Back

3:1

Front

What is the phenotypic ratio in a monohybrid cross of incomplete dominance?

Back

1:2:1

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.

Front

In a dihybrid cross of complete dominance, what is the phenotypic ratio?

Back

9:3:3:1

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic mix between two individuals with different alleles at one genetic locus of interest.

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic mix between two individuals that are both heterozygous for two traits.

Front

What is the probability of obtaining a red, axial offspring from a cross between a white, terminal flower and a red, axial flower?

Back

9/16

Front

What is the expected probability of obtaining a pink offspring from a cross between a white flower and a red flower in incomplete dominance?

Back

100%.

Front

What does the term 'phenotype' refer to in genetics?

Back

Phenotype refers to the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.