Problems
1. Consider a population of 10000 carps of which 9100 are Non-Blue colour and 900 are Blue coloured. Calculate the heterozygotes and homozygotes for the dominant allele. (Given : Non-Blue colour is dominant to Blue colour). 2. Two large populations of goldfish are being systematically crossed (males from one population bred to females of the other and vice versa). Nature of eyes is not a factor in determining which fishes are selected and which individual matings are made. Frequencies of eye genes at the D locus are Population 1 Population 2 D d D d 0.8 0.2 0.3 0.7 ________________________________ a)What will be the gene and genotypic frequencies at the D locus in the offspring of F1 population.? b) If the crossbred offspring are mated among themselves, what will be the gene and genotypic frequencies in the F2 generation? (Assume random mating, no selection, etc.) c) In the F3 and subsequent generations? 3. A trout farmer finds golden and palomino rainbow trout at his farm and wants to know the frequencies of the G and G1 alleles in his population of rainbow trout. Calculate the frequency of the number of G and G1 alleles and also genotypic frequency at the G locus. 4. A guppy farmer drained a pond and found the following. Phenotype Genotype Number Grey females XX 1650 Maculates males XYma 340 Grey males XY 510 Calculate the frequency of a Y linked gene in a population. |