How many unique gamete types are made by a white-eyed maleDrosophila?
A man who carries an X-linked allele will pass it on to______________
| a. | all of his daughters |
| b. | all of his sons |
| c. | half of his daughters |
| d. | all of his sons |
Genetic exchange between 2 homologous chromosomes is called
| a. | crossing over |
| b. | pleiotropy |
| c. | segregation |
| d. | chromosome pairing |
| e. | independent assortment |
Red-green color blindness is a sex-linked recessive traits inhumans. Two people with normal color vision have a color blind son.What are the genotypes of the parents?
| a. | XCXc and XCY |
| b. | XcXc and XcY |
| c. | XcXc and XCY |
| d. | XCXC and XcY |
| e. | XCXC and XCY |
In mice, apricot eyes is recessive to black eyes. Tail length isgoverned by another gene, linked to the eye color gene. Long tailsis dominant to short tails. To determine the distance between thetwo genes, a double heterozygote is mated in a testcross and theclasses of progeny produced were as follows:
Apricot eyes, Long tails 33
Apricot eyes, Shorttails             20
Black eyes, Longtails                17
Black eyes, Shorttails                30
Determine the map distance between the two genes
| a. | 63 map units |
| b. | 59% |
| c. | 37 map units |
| d. | 50% |
In mice, apricot eyes is recessive to black eyes. Tail length isgoverned by another gene, linked to the eye color gene. Long tailsis dominant to short tails. To determine the distance between thetwo genes, a double heterozygote is mated in a testcross and theclasses of progeny produced were as follows:
Apricot eyes, Long tails 33
Apricot eyes, Shorttails             20
Black eyes, Longtails                17
Black eyes, Shorttails                30
Determine whether the heterozygous parent is in the cis or transarrangement.
