Genetics Part Deux Review

Front

What is the phenotypic ratio for a dihybrid cross between two heterozygous parents?

Back

9:3:3:1

Front

What are the possible gametes for a parent with genotype DdHH?

Back

DH, DH, dH, dH

Front

What is co-dominance in genetics?

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 phenotypic ratio results from a cross between a heterozygous and a homozygous recessive parent?

Back

1:1

Front

What phenotypic ratio results from a cross between two heterozygous parents?

Back

9:3:3:1

Front

Define incomplete dominance.

Back

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

Front

What is the expected phenotypic ratio for a monohybrid cross between two heterozygous parents?

Back

3:1

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 does a Punnett square illustrate?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What is the significance of the F1 generation in genetics?

Back

The F1 generation is the first filial generation, resulting from a cross between two parental (P) generations.