- 1(current)
Q. No.| 1. | \(0\) | 2. | \(\dfrac{1}{16}\) |
| 3. | \(\dfrac{1}{2}\) | 4. | \(\dfrac{9}{16}\) |
When studying an inherited phenomenon, a geneticist discovers a phenotypic ratio of 9 :3 : 3 : 1 among offspring. This means that it is a dihybrid cross where the two genes are
| 1. | completely linke |
| 2. | incompletely linked |
| 3. | independently assorting |
| 4. | epistatic |
In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?
| 1. | Only round seeds with green cotyledons |
| 2. | Only wrinkled seeds with yellow cotyledons |
| 3. | Only wrinkled seeds with green cotyledons |
| 4. | Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons |
Select the correct statement from the ones given below with respect to dihybrid cross.
| 1. | Tightly linked genes on the same chromosomes show very few recombinations. |
| 2. | Tightly linked genes on the same chromosome show higher recombinations. |
| 3. | Genes far apart on the same chromosome show very few recombinations. |
| 4. | Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones. |
In peas, a tall, yellow-seeded plant is crossed with a homozygous short, green-seeded
plant. The progeny are 203 tall, green-seeded plants,199 short, green-seeded plants,207
tall, yellow-seeded plants, and 192 short, yellow-seeded plants.
The most likely genotype of the tall, yellow-seeded parent is
| 1. | TtYy | 2. | TTYY |
| 3. | ttyy | 4. | ttYY |
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