A common test to find the genotype of a hybrid is by:
1. crossing of one F2 progeny with a male parent
2. crossing of one F2 progeny with a female parent
3. studying the sexual behaviour of F1 progenies
4. crossing of one F1 progeny with a male parent
In pea plants, yellow seeds are dominant to green. If a heterozygous yellow-seeded plant is crossed with a green-seeded plant, what ratio of yellow and green-seeded plants would you expect in F1generation?
1. 50:50
2. 9:1
3. 1:3
4. 3:1
Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?
1. Moist bread
2. Agar agar
3. Ripe banana
4. Cow dung
Phenotype of an organism is the result of:
1. mutations and linkages
2. cytoplasmic effects and nutrition
3. environmental changes and sexual dimorpgism
4. genotype and environment interactions
In which mode of inheritance do you expect more maternal influence among the offspring?
1. Autosomal
2. Cytoplasmic
3. Y-linked
4. X-linked
How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
1. Three
2. Four
3. Nine
4. Two
Which one of the following is an example of polygenic inheritance?
1. Flower colour in Mirabilis jalapa
2. Production of male honey bee
3. Pod shape in garden pea
4. Skin colour in humans
In Mendel's experiments with garden peas, round seed shape (RR) was dominant over wrinkled seeds (rr), and 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 |
Test cross involves:
1. | crossing between two genotypes with recessive trait |
2. | crossing between two F1 hybrids |
3. | crossing the F1 hybrid with a double recessive genotype |
4. | crossing between two genotypes with the trait |
If a colourblind woman marries a normal-visioned man, their sons will be:
1. all normal visioned
2. one-half colourblind and one-half normal
3. three-fourths colourblind and one-fourth normal
4. all colourblind