#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?
#Question id: 4770
#Unit 8. Inheritance Biology
When two independent pure lines of pea with white flowers are crossed, the F1 progeny has purple flowers. The F2 progeny obtained on selfing shows both pruple and white flower in a ratio of 15:1. The following conclusions were made
A. Two different genes are involved, mutation in which lead to formation of white flower.
B. These two genes does not show independent assortment
C. This is an example of complementary gene action
D. The is an example of duplicate genes
Which of the following conclusions are correct?
#Question id: 4771
#Unit 8. Inheritance Biology
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes as follows:
Are genes for eye color and wing length x link or autosome?
#Question id: 4772
#Unit 8. Inheritance Biology
A black Labrador, Three phenotype of black, brown and yellow is control by non allelic gene interaction. Following some genotype
The following conclusions were made
A. The 9:3:4 ratio obtained upon selfing of AaBb here indicates recessive epistasis
B. This is a recessive epistasis where homozygous bb is epistatic to A and a.
C. When Gene A and B incompletely link, It will be produced all phenotype black, brown and yellow upon selfing of AaBb
D. When Gene A and B incompletely link, test cross of AaBb will be produced all phenotype black, brown and yellow in ratio 1:1:2 respectively
Which of the following conclusions are correct?