Wednesday-Punnett Square

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 is the genotype of a white-flowering plant in a species where red (R) is dominant over white (r)?

Back

rr

Front

What is the probability of obtaining a yellow pea pod if yellow is dominant and the parents are heterozygous?

Back

75% chance of yellow pods.

Front

What is the genotype of a homozygous dominant individual?

Back

The genotype is represented as two identical dominant alleles, e.g., AA.

Front

What is the phenotype of a plant with the genotype Tt?

Back

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

Front

How do you represent a recessive allele in genetic notation?

Back

A recessive allele is typically represented by a lowercase letter, e.g., 't'.

Front

What is the expected phenotypic ratio in a monohybrid cross?

Back

The expected phenotypic ratio is 3:1 for dominant to recessive traits.

Front

What does it mean for an organism to be homozygous?

Back

An organism is homozygous when it has two identical alleles for a particular trait.

Front

What is the expected genotype ratio from a cross between two heterozygous parents (Tt x Tt)?

Back

1 TT : 2 Tt : 1 tt.