Punnett Square Flashcard

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by letters (e.g., TT, Tt, tt).

Front

What is a phenotype?

Back

A phenotype is the physical appearance or observable traits of an organism, such as red hair or tallness.

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a trait (e.g., Tt).

Front

What does homozygous mean?

Back

Homozygous means having two identical alleles for a trait (e.g., TT or tt).

Front

What is the purpose of a Punnett Square?

Back

A Punnett Square is used to predict the possible genotypes and phenotypes of offspring from a genetic cross.

Front

What is the genotype for a tall plant if T is tall and t is short?

Back

The possible genotypes are TT (homozygous tall), Tt (heterozygous tall), and tt (short).

Front

If TT = 25%, Tt = 50%, and tt = 25%, what does this mean?

Back

It means that in a genetic cross, 25% of the offspring are expected to be TT, 50% Tt, and 25% tt.

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What does it mean if an organism is homozygous recessive?

Back

It means the organism has two recessive alleles for a trait (e.g., tt).

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical appearance.