Punnett Squares Check In

Front

What is a Punnett Square?

Back

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

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

Front

What does it mean for an allele to be recessive?

Back

A recessive allele is one that only expresses its trait when two copies are present in the genotype.

Front

What is the genotype of a homozygous tall plant?

Back

TT (two dominant alleles).

Front

What is the genotype of a homozygous short plant?

Back

tt (two recessive alleles).

Front

What is the genotype of a heterozygous tall plant?

Back

Tt (one dominant and one recessive allele).

Front

In a Tt x Tt cross, what are the possible genotypes of the offspring?

Back

TT, Tt, Tt, tt.

Front

What is the phenotypic ratio of a Tt x Tt cross?

Back

3 tall : 1 short.

Front

What is the probability of producing a short plant from a Tt x Tt cross?

Back

25%.

Front

How are alleles represented in genetics?

Back

Alleles are represented by letters, with capital letters for dominant alleles and lowercase letters for recessive alleles.