Genetics: Review 2

Front

What type of 'square' helps us solve genetic problems?

Back

Punnett square

Front

What term denotes the physical expression of a gene?

Back

Phenotype

Front

Genotype refers to the ...

Back

the possible combination of alleles in a gene

Front

In a Punnett square, if T = tall and t = short, what belongs in the missing square if the other squares are Tt, Tt, and Tt?

Back

tt

Front

Colorblindness is a recessive X-linked disorder. Which genotype represents a male with normal vision?

Back

X^N Y

Front

What is the definition of genotype?

Back

The genetic constitution of an individual, representing the alleles inherited from parents.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.

Front

What does a homozygous genotype mean?

Back

A genotype consisting of two identical alleles for a particular gene.

Front

What does a heterozygous genotype mean?

Back

A genotype consisting of two different alleles for a particular gene.

Front

What is the purpose of a Punnett square?

Back

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