Genetics: Punnett Squares

Front

What does it mean to be heterozygous?

Back

Having two different alleles for a trait (sometimes called hybrid).

Front

What is the genotype for a pea plant that is heterozygous for round seeds (R) and homozygous recessive for green seeds (y)?

Back

Rryy

Front

What do dominant alleles look like in terms of letter representation?

Back

Dominant alleles are represented by capital letters.

Front

What is the genotype represented by 'Tt'?

Back

Heterozygous.

Front

What is a Punnett square used for?

Back

To predict the genotypes of offspring from parental genotypes.

Front

What does homozygous mean?

Back

Having two identical alleles for a trait.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of a trait.

Front

If a plant has the genotype 'TT', what is its phenotype?

Back

The phenotype will express the dominant trait.

Front

What is the purpose of using lowercase letters in genetics?

Back

Lowercase letters represent recessive alleles.

Front

In a Punnett square, what does each box represent?

Back

Each box represents a possible genotype of the offspring.