In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color. The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a dwarf plant with white flowers produces 1/4 tall purple, 1/4 tall white, 1/4 dwarf purple, and 1/4 dwarf white. What is the genotype of the parents?

Protein products of which genes “put the brakes” on the cell cycle when DNA is damaged or incompletely copied?

Genetic diversity arises as a consequence of ________, which produce(s) different alleles of a gene.

Which eye color has dense melanin deposits in the iris?

Which of the following is typical of cancer cells?

A bell-shaped curve of phenotypic variation is indicative of

Dolly, the cloned sheep, had telomeres that ___________________.

The essence of meiosis is that __________________________________.

In sexual reproducers, meiosis gives rise to _____________.

During ____, microtubules fasten the cell’s chromosomes to the spindle poles.