Monohybrid and Dihybrid Practice Flashcard

Front

What is a homozygous dominant genotype?

Back

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

Front

What is a homozygous recessive genotype?

Back

A genotype with two identical recessive alleles (e.g., yy or tt).

Front

What is a heterozygous genotype?

Back

A genotype with one dominant and one recessive allele (e.g., Yy or Tt).

Front

Define a monohybrid cross.

Back

A genetic cross between individuals that differ in one trait (e.g., flower color).

Front

Define a dihybrid cross.

Back

A genetic cross between individuals that differ in two traits (e.g., seed shape and color).

Front

What is the phenotypic ratio of a monohybrid cross?

Back

Typically 3:1 for dominant to recessive traits.

Front

What is the phenotypic ratio of a dihybrid cross?

Back

Typically 9:3:3:1 for two traits.

Front

What does the letter 'B' represent in guinea pig genetics?

Back

The allele for short hair, which is dominant over the allele for long hair (b).

Front

What is the expected genotype ratio from a Bb x Bb cross?

Back

1 BB : 2 Bb : 1 bb.

Front

What is the expected phenotype ratio from a Bb x Bb cross?

Back

3 short hair : 1 long hair.