Genetics Flashcard 1 Review

Front

What is a homozygous dominant genotype?

Back

A genotype with two identical dominant alleles (e.g., BB).

Front

What is a heterozygous genotype?

Back

A genotype with one dominant and one recessive allele (e.g., Bb).

Front

What is a homozygous recessive genotype?

Back

A genotype with two identical recessive alleles (e.g., bb).

Front

What does it mean if a trait skips a generation?

Back

It indicates that the trait is recessive.

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

gg.

Front

What are the possible genotypes from crossing a homozygous dominant (BB) and a heterozygous (Bb) dog?

Back

50% BB and 50% Bb.

Front

What is the phenotypic ratio of offspring from two heterozygous tall pea plants (Tt)?

Back

75% tall and 25% short.

Front

Define dominant allele.

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

Define recessive allele.

Back

An allele that expresses its trait only when two copies are present.

Front

What is the significance of the letter 'G' in genetics?

Back

It typically represents a dominant allele.