#Question id: 4764
#Unit 8. Inheritance Biology
Which of the following is the best example of overdominance?
#Question id: 4765
#Unit 8. Inheritance Biology
The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?
#Question id: 4766
#Unit 8. Inheritance Biology
In soybeans, resistance to sudden death syndrome (SDS) is inherited as a dominant condition. In some cases, individuals that are not resistant to SDS (but whose parents were) can pass the trait on to their progeny. This is an example of which of the following?
#Question id: 4767
#Unit 8. Inheritance Biology
Neurofibromatosis is a condition in humans which is generally inherited in a dominant fashion. Assuming this disorder is 90% penetrant, what is the chance that a single child born to a father with neurofibromatosis and a mother known not to carry the mutation will have the disorder?
#Question id: 4768
#Unit 8. Inheritance Biology
A trait that appears to be dominant in one sex but recessive in the other is called:
#Question id: 4769
#Unit 8. Inheritance Biology
In some sheep, the presence of horns is produced by an autosomal allele that is dominant in males and recessive in females. A horned female is crossed with a hornless male. One of the resulting F1 females is crossed with a hornless male. What proportion of the male and female progeny from this cross will have horns?