Punnett Squares Basics

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the combination of alleles (e.g., Aa, DD, bB).

Front

What are phenotypes?

Back

Phenotypes are the observable traits or characteristics of an organism, such as color, shape, or size (e.g., red hair).

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to having two identical dominant alleles for a trait (e.g., RR for round seeds in pea plants).

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 the letter 'R' represent in pea plants?

Back

In pea plants, 'R' represents the dominant allele for round seeds.

Front

What does the letter 'r' represent in pea plants?

Back

In pea plants, 'r' represents the recessive allele for wrinkled seeds.

Front

What is the probability of getting a homozygous recessive genotype (rr) from a cross of Rr x Rr?

Back

The probability is 25%.

Front

What is the probability of getting a phenotype of white fur (bb) from a cross of Bb x Bb?

Back

The probability is 25%.

Front

What does heterozygous mean?

Back

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

Front

What is the phenotype of a plant with genotype TT?

Back

The phenotype is tall, as T is the dominant allele.