HBio-Dihybrid

Front

What is a dihybrid cross?

Back

A genetic cross between individuals that differ in two traits, typically involving two pairs of contrasting traits.

Front

Define homozygous genotype.

Back

A genotype consisting of two identical alleles for a particular gene (e.g., RR or rr).

Front

Define heterozygous genotype.

Back

A genotype consisting of two different alleles for a particular gene (e.g., Rr).

Front

What does the letter 'R' represent in genetics?

Back

R represents the allele for round seeds.

Front

What does the letter 'r' represent in genetics?

Back

r represents the allele for wrinkled seeds.

Front

What does the letter 'Y' represent in genetics?

Back

Y represents the allele for yellow seeds.

Front

What does the letter 'y' represent in genetics?

Back

y represents the allele for green seeds.

Front

What is the probability of an offspring having wrinkled and green seeds from a cross of RrYy x rrYy?

Back

2/16 or 1/8.

Front

What is the probability of an offspring having round and yellow seeds from a cross of RRYY x rryy?

Back

1 or 100% (4/4 or 8/8).

Front

What is the genotype for a pea plant heterozygous for round seeds and homozygous recessive for green seeds?

Back

Rryy.