Unit 3 Topic 2 Vocabulary

Front

What is a dominant allele?

Back

An allele that is fully expressed whenever it is present.

Front

What is a genotype?

Back

The combination of genes for one or more specific traits.

Front

What is the yellow seed genotype?

Back

AA or Aa.

Front

What is the result of incomplete dominance in terms of phenotype?

Back

A phenotype that is a blend of the phenotypes of the parents.

Front

What does 'homozygous' mean in genetics?

Back

Having two dominant or two recessive alleles for a gene.

Front

What is a recessive allele?

Back

An allele that is only expressed in the absence of a dominant allele.

Front

What is a phenotype?

Back

The physical appearance of an organism.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles, while heterozygous means having two different alleles for a gene.

Front

What does it mean if an organism is heterozygous for a trait?

Back

It has one dominant and one recessive allele for that trait.

Front

What is the purpose of a Punnett square?

Back

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