Basic Genetics Review

Front

What is the genotype for a homozygous recessive individual?

Back

aa

Front

What is the dominant trait in a Punnett square for pea seeds?

Back

Yellow pea seeds

Front

What is the term for a trait that requires two alleles to be expressed?

Back

Recessive

Front

If two brown-eyed parents (Bb) have a baby, what is the probability that the baby will have blue eyes?

Back

25%

Front

What is another term for homozygous?

Back

Purebred

Front

What does the term 'allele' refer to in genetics?

Back

Different forms of a gene that can exist at a specific locus.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Front

What is a Punnett square used for?

Back

To predict the genotypes of offspring from parental genotypes.

Front

What does it mean if an organism is heterozygous?

Back

It has two different alleles for a particular gene (e.g., Bb).

Front

What is the phenotype of an organism?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.