List of top five numerical problems on sex-linked inheritance. Q.1. Of what type will be the children with reference to colour blindness, when a man is colour-blind and his wife is normal? Solution: The cause of the colour blindness is the presence of recessive (c) gene on the X chromosome. Because man is colour-blind (XcY) and his wife is normal [...]
List of sixteen numerical problems on monohybrid cross. Q.1. What will be the appearance of (a) F1 and (b) F2 progenies when a pure (homozygous) tall pea plant is crossed with a pure (homozygous) dwarf pea plant? Tallness (T) gene is dominant over dwarfness (t) gene. Solution: Pure (homozygous) tall pea plant = TT Pure (homozygous) dwarf pea plant = [...]
The below mentioned article provides a note on Mendelian laws in the light of modern genetics. Segregation: In the F1 generation of Mendel's monohybrid cross, the plants are heterozygous and their genetic composition is Tt. The phenotype is tall and shows no visible indication of the presence of the gene t, though it is present in the genotype. The two [...]