Punnett Square Credit Genetics and Punnett squares

Front

What does a capital letter represent in genetics?

Back

A dominant trait that is always shown.

Front

What is the genotype of a parent that is heterozygous?

Back

A genotype with one dominant and one recessive allele, represented as Rr.

Front

What is the percent chance of having a recessive phenotype if both parents are heterozygous?

Back

25% chance of having the recessive phenotype.

Front

Which genotype is homozygous recessive?

Back

The genotype 'rr'.

Front

What does the term 'phenotype' mean?

Back

The physical appearance or observable traits of an organism.

Front

What does the term 'genotype' refer to?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is a Punnett square used for?

Back

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

Front

If a trait is recessive, what must be true for it to be expressed?

Back

The organism must have two recessive alleles (homozygous recessive).

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous has two identical alleles (e.g., RR or rr), while heterozygous has one of each (e.g., Rr).

Front

What does it mean if an organism is homozygous dominant?

Back

It has two dominant alleles (e.g., RR) and will express the dominant trait.