Questions from Genetics

Q: In Figure 3.18, Morgan obtained a white-eyed

In Figure 3.18, Morgan obtained a white-eyed male fly in a population containing many red-eyed flies that he thought were true-breeding. As mentioned in the experiment, he crossed this fly with severa...

Q: A diploid eukaryotic cell has 10 chromosomes (5 per set).

A diploid eukaryotic cell has 10 chromosomes (5 per set). As a group, take turns having one student draw the cell as it would look during a phase of mitosis, meiosis I, or meiosis II; then have the ot...

Q: Let’s suppose a gene exists as a functional wild-type allele

Let’s suppose a gene exists as a functional wild-type allele and a nonfunctional mutant allele. At the organism level (i.e., at the level of visible traits), the wild-type allele is dominant. In a het...

Q: In oats, the color of the chaff is determined by a

In oats, the color of the chaff is determined by a two-gene interaction. When a true-breeding black chaff plant was crossed to a true-breeding white chaff plant, the F1 generation was composed of all...

Q: Recessive maternal effect genes are identified in flies (for example)

Recessive maternal effect genes are identified in flies (for example) when a phenotypically normal mother cannot produce any normal offspring. Because all of the offspring are dead, this female fly ca...

Q: Which of these three scenarios explains overdominance with regard to the sickle

Which of these three scenarios explains overdominance with regard to the sickle cell allele? From Figure 4.8:

Q: According to the endosymbiosis theory, mitochondria and chloroplasts are derived from

According to the endosymbiosis theory, mitochondria and chloroplasts are derived from bacteria that took up residence within eukaryotic cells. At one time, prior to being taken up by eukaryotic cells,...

Q: Discuss the principles of the chromosome theory of inheritance. Which principles

Discuss the principles of the chromosome theory of inheritance. Which principles were deduced via light microscopy, and which were deduced from crosses? What modern techniques could be used to support...

Q: In mice, a dominant allele that causes a short tail is

In mice, a dominant allele that causes a short tail is located on chromosome 2. On chromosome 3, a recessive allele causing droopy ears is 6 mu away from another recessive allele that causes a flaky t...

Q: In Chapter 3, we discussed the idea that the X and

In Chapter 3, we discussed the idea that the X and Y chromosomes have a few genes in common. These genes are inherited in a pseudoautosomal pattern. With this phenomenon in mind, discuss whether or no...