3. The ABO blood type tn human is under the control of autosomal multiple alleles. Colour blindness is recessive X-linked trait. A male with a blood type A and normal […]
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CSIR NET Life Science Previous Year Questions and Solution on CONCEPTS OF GENE
Possible father blood groups when mother is O and child is A
2. A mother of blood group O has a group A child. The father could be of blood type (1) A or B or O. (2) A only. (3) A […]
CSIR NET Life Science Previous Year Questions and Solution on CONCEPTS OF GENE
Difference between blood group A antigen and H antigen in type O blood
1. Blood group tupe A antigen is a complex oligosaccharide which differs from H antigen present in type O individual by the presence of terminal (1) Glucose (2) Galactose (3) […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Genotypes of white, sphere summer squash parents producing 1/4 white, 1/4 yellow sphere fruits
36. In summer squash, white colour fruit (W) is dominant over yellow colour (w) and disc-shaped phenotype (D) is dominant over sphere-shaped phenotype (d). Determine the genotype of the parents […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Determining parental genotypes from Drosophila progeny ratios (ebony and vestigial)
35. A phenotypically normal fruit fly was crossed to another fly whose phenotype was not recorded. Of the progeny, 3/8 were wild type, 3/8 had ebony body color, 1/8 had […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Probability that three F₂ pea plants are two dwarf and one tall
34. Mendel crossed tall pea plants with dwarf ones. The F1 plants were all tall. When these F1 plants were selfed to produce F2 generation, he got a 3: 1 […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Probability that three children are two daughters and one son (1:1 sex ratio)
33. Assuming a 1 : 1 sex ratio. what is the probability that three children from the same parents will consist of two daughters and one son? (1) 0.375 (2) […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Probability of recovering a male‑sterile line when Ms and F assort independently
32. In a plant, male sterility is caused by the presence of a dominant allele for a nuclear gene (Ms). There are also lines which carry a gene whose dominant […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Proportion of aabb progeny when AaBb (50 map units apart) is selfed
31. A plant of the genotype AaBb is selfed. The two genes are linked and are 50 map units apart. What proportion of the progeny will haw the genotype aabb? […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
How many different gametes can AaBbccDDEe produce?
30. How many genetically different gametes can be made by an individual of genotype AaBbccDDEe? (1) 3 (2) 5 (3) 1/4 (4) 32 Step-by-step reasoning Genotype: Aa Bb cc DD […]
