Punnett Square Flashcard Study Guide

Front

What do lowercase letters represent in genetics?

Back

Recessive traits.

Front

Define Phenotype.

Back

The physical appearance of an organism (tall, short, red, white).

Front

What is the Phenotype ratio for the cross BB x Bb?

Back

4 black : 0 White.

Front

Define Genotype.

Back

The genetic make-up (GG, Gg, gg) of an organism.

Front

What is the Phenotype ratio for the cross RR x RW in Incomplete Dominance?

Back

2 Red : 0 White : 2 Pink.

Front

What is a Punnett Square used for?

Back

To predict the genetic outcomes of a cross between two organisms.

Front

What does a dominant allele do?

Back

It masks the effect of a recessive allele.

Front

What is the difference between Genotype and Phenotype?

Back

Genotype is the genetic makeup, while Phenotype is the physical appearance.

Front

What does it mean if an organism is homozygous?

Back

It has two identical alleles for a trait.

Front

What does it mean if an organism is heterozygous?

Back

It has two different alleles for a trait.