Vocab and Monohybrid Crosses

Front

What does heterozygous mean?

Back

An organism that has different genes for a trait (Tt).

Front

What does homozygous mean?

Back

An organism that has the same genes for a trait (TT or tt).

Front

Define genotype.

Back

The possible combination of alleles in a gene.

Front

What is the phenotype?

Back

The physical expression of the genes.

Front

What are alleles?

Back

Different forms of a gene that determine a specific trait.

Front

What does dominant mean in genetics?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What does recessive mean in genetics?

Back

An allele that only expresses its trait when two copies are present.

Front

What is a monohybrid cross?

Back

A genetic cross between individuals that involves one pair of contrasting traits.

Front

What is the purpose of a Punnett square?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.

Front

If G = green and g = yellow, what is the phenotype of a plant with genotype Gg?

Back

Green.