Dihybrid Cross Practice

Front

What is a dihybrid cross?

Back

A genetic cross that involves two traits, each represented by two alleles.

Front

Define homozygous dominant.

Back

An organism with two identical dominant alleles for a trait (e.g., AA).

Front

Define heterozygous.

Back

An organism with two different alleles for a trait (e.g., Aa).

Front

What does the Punnett square represent?

Back

A diagram used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What is the phenotypic ratio in a typical dihybrid cross?

Back

9:3:3:1.

Front

What is the genotype for a plant that is homozygous for round seeds and heterozygous for yellow seeds?

Back

RRYy.

Front

What phenotype is expressed when a dominant allele is present?

Back

The dominant phenotype is expressed.

Front

What is the probability of obtaining a homozygous recessive offspring from a dihybrid cross?

Back

It depends on the specific genotypes of the parents.

Front

What does the term 'allele' mean?

Back

An alternative form of a gene that can exist at a specific locus.

Front

What is the significance of the F1 generation in genetics?

Back

The first generation of offspring from a cross, often showing dominant traits.