19. In a heterozygous individual for a given gene, if a crossing over has occurred between the gene locus and the centromere of the chromosome, the segregation of the two […]
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CSIR NET Life Science Previous Year Questions and Solution on Genetics
Stage of allele segregation in Drosophila male meiosis without recombination
18. In Drosophila males, where no recombination occurs, segregation of the two alleles of a gene occurs at which stage of cell division? (1) Diplotene (2) Anaphase I (3) Anaphase […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Stage of allele segregation in Drosophila male meiosis without crossing over
17. In Drosophila melanogaster males, homologous chromosomes pair and segregate during meiosis but crossing over does not occur. At which stage of meiosis does segregation of 2 alleles of a […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
What do you call a cross between pure-breeding red and white flower plants?
16. A cross made between a pure breeding plant having red coloured flowers with a pure breeding plant having white coloured flowers. Such a cross is called as (1) test […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Phenotypes after selfing all F2 round seeds from a 3:1 Mendelian cross
15. Mendel during his experiment on garden pea observed F2 ratio of 3:1 on selfing round seed plants where 3 were round and 1 was wrinkle. If all round seed […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
At which division do alleles segregate when no crossing over occurs?
14. During gamete formation, if there is no crossing over, the pair of alleles segregates during (1) Meiosis-I (2) Meiosis-II (3) Mitosis (4) Cleavage Core concept Mendel’s law of segregation says the […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Probability of getting AABB from selfed AaBb plant
13. If plant with genotype AaBb is self-pollinated Where the A and B are not linked, then the probability of getting AABB genotype will be (1) 1/4 (2) 1/8 (3) […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
Why independent assortment is tied to metaphase I of meiosis
12. The Mendelian law of Independent assortment is due to arrangement of chromosome during (1) Metaphase-I (2) Anaphase-I (3) Metaphase-II (4) Anaphase-II Explanation: Mendel’s law of independent assortment states that […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
How many gametes from genotype AABBCcDdEe?
11. Possible types of gametes formation from genotype AABBCcDdEe would be- (1) 16 (2) 64 (3) 8 (4) 128 Step-by-step reasoning Genotype given: AABBCcDdEe A: AA → homozygous (only A […]
CSIR NET Life Science Previous Year Questions and Solution on Genetics
How many gametes from genotype AaBbCcDdEeFfGg?
10. Possible combination of gametes which can be formed by genotype AaBbCcDdEeFfGg are? (1) 16 (2) 32 (3) 64 (4) 128 Step-by-step reasoning Genotype: AaBbCcDdEeFfGg Each gene is heterozygous (A/a, […]
