Punnett Square Final

Front

Heterozygous is when...

Back

the alleles are different.

Front

Which of the following alleles is recessive? Tt, tt, TT

Back

tt.

Front

An observable characteristic is also known as a...

Back

trait.

Front

In plants, tall (T) is dominant to short (t). What is the probability of producing a short plant from a Tt x Tt cross?

Back

25%.

Front

Humans have _______ pairs of chromosomes, for a total of _______ chromosomes.

Back

23 pairs, 46 chromosomes.

Front

What is a Punnett Square used for?

Back

To predict the genotypes and phenotypes of offspring from genetic crosses.

Front

Define genotype.

Back

The genetic makeup of an organism, represented by alleles.

Front

Define phenotype.

Back

The observable physical or biochemical characteristics of an organism.

Front

What does it mean if an allele is dominant?

Back

It masks the effect of a recessive allele in a heterozygous genotype.

Front

What is the genotype of a homozygous dominant individual?

Back

Both alleles are the same and dominant (e.g., TT).