AP Biology: Unit 5 Review

Front

In the individual with genotype AaBB, what percent of gametes will contain the A allele?

Back

50%

Front

If a stem cell (body cell) has 24 chromosomes, how many will it have at the end of meiosis?

Back

12

Front

The chromosomes that pair up during meiosis, are called __________ chromosomes.

Back

homologous

Front

Describe the cause of a genetic cross resulting in greater than 50% parental phenotypes and less than 50% recombinant phenotypes.

Back

Genes are linked on the same chromosome.

Front

Homologous chromosomes have the same...

Back

genes in the same loci (locations).

Front

What is the process by which a single cell divides to produce four genetically diverse gametes?

Back

Meiosis.

Front

Define allele.

Back

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

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous has two identical alleles, while heterozygous has two different alleles.

Front

What is the significance of crossing over during meiosis?

Back

It increases genetic diversity by exchanging genetic material between homologous chromosomes.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism.