Unit 7 Genetics 1 no Punnetts

Front

What does genotype refer to?

Back

The possible combination of alleles.

Front

What is the difference between a purebred and a hybrid organism?

Back

A purebred organism has two identical alleles for a trait, while a hybrid organism has two different alleles.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

Front

What trait did Marisol most likely inherit?

Back

Height.

Front

What is a recessive allele?

Back

An allele whose trait only shows up when no dominant allele is present.

Front

What is the definition of an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the significance of dominant alleles in genetics?

Back

Dominant alleles mask the expression of recessive alleles in heterozygous individuals.

Front

How can you determine if an organism is homozygous or heterozygous?

Back

By examining the alleles for a specific trait; homozygous has identical alleles, while heterozygous has different alleles.

Front

What is the role of environmental factors in determining phenotype?

Back

Environmental factors can influence the expression of genes, affecting the phenotype of an organism.

Front

What is the purpose of a Punnett square?

Back

A Punnett square is used to predict the genetic outcomes of a cross between two organisms.