- 1(current)
Q. No.Identify the correct statements regarding linked genes:
| I. | are located near each other on the same chromosome. |
| II. | violate the law of independent assortment. |
| III. | segregate together during meiosis. |
| 1. | I & II only | 2. | I & III only |
| 3. | II & III only | 4. | I, II & III |
All genes located on the same chromosome:
| 1. | Form different groups depending upon their relative distance |
| 2. | Form one linkage group |
| 3. | Will not from any linkage groups |
| 4. | Form interactive groups that affect the phenotype |
If a chiasma forms between the loci of genes A and B in 20 % of the tetrads of an individual of genotype AB/ab, the percentage of gametes expected to be Ab is:
| 1. | 40 | 2. | 20 |
| 3. | 10 | 4. | 5 |
A dihybrid test cross shows a frequency of recombination of 50 %. The best explanation will be:
| 1. | The two genes are likely to be located on different chromosomes |
| 2. | All of the offspring have combinations of traits that match one of the two parents |
| 3. | The genes are located on sex chromosomes |
| 4. | Abnormal meiosis has occurred |
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Half of the male and half of the female offspring were red-eyed, and half of the male and half of the female offspring were white-eyed when a female Drosophila of unknown genotype was crossed with a white-eyed male fly, of genotype XwY. What was the genotype of the female fly?
| 1. | Xw+ Xw+ | 2. | Xw Xw |
| 3. | Xw+ Xw | 4. | Xw+ Y |
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The frequency of crossing over between any two linked genes will be:
| 1. | Higher if they are recessive |
| 2. | Dependent on how many alleles there are |
| 3. | Determined by their relative dominance |
| 4. | Proportional to the distance between |
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- 1(current)
Q. No.
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