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30. A population is in Hardy-Weinberg equilibrium for a gene with only two alleles (“A” and “a”). If the gene frequency of the allele “A” is 0.7, genotype frequency of […]

29. If a colour-blind woman marries a normal man, the chance that their boy child will be colour-blind is %. Color Blindness Inheritance: Probability of a Colour-Blind Boy Child Introduction […]

28. Both strands of a DNA molecule are labeled with radioactive thymidine and are allowed to duplicate in an environment containing non-radioactive thymidine. The number of DNA molecules that will […]

27. The total number of genetically different types of gametes that will be produced by a heterozygous plant carrying the genotypes AABbCc is.          Total Number of Genetically Different Gametes […]

26. Heterozygous female fruit flies with gray body and purple eyes were mated with homozygous males with black body and red eyes. The number of offspring obtained and their phenotypes […]

25. A rare genetic disorder resulting from homozygosity for a recessive allele (r) occurs in 2 out of every 10,000 individuals in a population. Assuming that (i)the disorder is not […]

24. In a farm animal breeding programme, the animal with the dominant A phenotype, the recessive b phenotype, the dominant D phenotype, and the recessive e phenotype are commercially important. […]

23. In a plant species, the genotype DDEE is crossed with the genotype ddee; and the F₁ is test crossed. Considering that the two genes are linked and 20 map […]

22. In humans, Down syndrome is caused by (A) Trisomy 16 (B) Trisomy 18 (C) Trisomy 21 (D) Trisomy 22 Down Syndrome Explained: Why Trisomy 21 Causes Down Syndrome Introduction […]

21. A population of 1000 plants in Hardy-Weinberg equilibrium has genotypes: RR = 640, Rr = 320, rr = 40. The frequency of r allele (in percentage) is __________ (rounded […]