Exam 10: Patterns of Inheritance

Primroses have white flowers when grown above 32°C but red flowers when grown at 24°C. This interaction between phenotypic expression and environment is an example of

Which of the following is true with regards to the law of independent assortment?

Cold weather can change what aspect of a Himalayan rabbit?

Matt breeds and sells snakes. He knows that he can make the most money by breeding and selling albino snakes. Albinism is a recessive trait. His female albino corn snake just produced six offspring. Two displayed normal coloration and four were albino. What is the chance that another offspring produced by the same parents will be albino?

On one chromosome, the allele for white eyes is located at loci 12 and the allele for a hairy body is located at loci 16. On a second chromosome, the allele for red eyes is located at loci 15 and the allele for a normal body is located at loci 17. Which allele combination has the greater map distance?

A blue-eyed, left-handed woman marries a brown-eyed, right-handed man who is heterozygous for both of histraits. If blue eyes and left-handedness are recessive, how many different phenotypes are possible in their children?

Alleles are

If both parents express a particular trait, but their child does not, what does this indicate about the trait?

A couple has three children, two of which have blonde hair. The third child and both parents have dark hair. What can be determined about the gene for hair color in this family?

Which of the following is true in regards to an autosomal recessive pedigree?

Matt breeds and sells snakes. He knows that he can make the most money by breeding and selling albino snakes. Albinism is a recessive trait. His female albino corn snake just produced six offspring. Two displayed normal coloration and four were albino. What do you know about the genotype of the baby snakes with the normal coloration?

In fruit flies, red-eyes are dominant to white-eyes. In addition, eye color is a sex-linked trait. A red-eyed male Drosophila mates with a red-eyed female Drosophila. One of the female's parents had white eyes. What proportion of the male offspring will have white eyes?

Skin color is coded for by several different genes which results in a range of skin colors from very dark to very light. This is an example of

Alleles that are linked on the same chromosome will always assort independently during meiosis.

Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of

What does true-breeding mean?

Which of the following is an inaccurate statement about human blood types?

Hunter syndrome is a rare genetic disorder in which large sugar molecules called glycosaminoglycans build up in body tissues. Hunter syndrome causes abnormalities in many organs, including the skeleton, heart, and respiratory system. In severe cases, this leads to death during the teenage years. Hunter syndrome is caused by a recessive gene on the X chromosome. If a woman who is normal (but had a father with the disease) marries a normal man, what are the chances of having a daughter affected by the disease?

Which of the following is mismatched?

If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of ________. However, if the calf has black and white spots, this would be an example of________.