Questions from Genetics


Q: Explain why maternal effect genes exert their effects during the early stages

Explain why maternal effect genes exert their effects during the early stages of development.

See Answer

Q: As described in Chapter 22, researchers have been able to clone

As described in Chapter 22, researchers have been able to clone mammals by fusing a cell having a diploid nucleus (i.e., a somatic cell) with an egg that has had its nucleus removed. A. With regard t...

See Answer

Q: What is the difference in meaning between the terms genetic recombination and

What is the difference in meaning between the terms genetic recombination and crossing over?

See Answer

Q: In humans, a rare dominant disorder known as nail-patella

In humans, a rare dominant disorder known as nail-patella syndrome causes abnormalities in the fingernails, toenails, and kneecaps. Researchers have examined family pedigrees with regard to this disor...

See Answer

Q: When true-breeding mice with brown fur and short tails (

When true-breeding mice with brown fur and short tails (BBtt) were crossed to true-breeding mice with white fur and long tails (bbTT), all of the F1 offspring had brown fur and long tails. The F1 offs...

See Answer

Q: Though we often think of genes in terms of the phenotypes they

Though we often think of genes in terms of the phenotypes they produce (e.g., curly leaves, flaky tail, brown eyes), the molecular function of most genes is to encode proteins. Many cellular proteins...

See Answer

Q: If the likelihood of a single crossover in a particular chromosomal region

If the likelihood of a single crossover in a particular chromosomal region is 10%, what is the theoretical likelihood of a double or triple crossover in that same region? How would positive interferen...

See Answer

Q: In most two-factor crosses involving linked genes, we cannot

In most two-factor crosses involving linked genes, we cannot tell if a double crossover between the two genes has occurred because the offspring will inherit the nonrecombinant pattern of alleles. How...

See Answer

Q: Researchers have discovered that some regions of chromosomes are much more likely

Researchers have discovered that some regions of chromosomes are much more likely than others to cross over. We might call such a region a “hot spot” for crossing over. Let’s suppose that two genes, g...

See Answer

Q: During which phase are sister chromatids separated and sent to opposite poles

During which phase are sister chromatids separated and sent to opposite poles?

See Answer