Question

If a red colored female cattle is crossed with a white male cattle, what will be the appearance of progeny in F₂ generation? Show the genotypes with the help of a chart.

Answer 1

When a red coloured female cattle is crossed with a white male cattle, F₁ and F₂ progeny are obtained as follows:

      Representation of co-dominance in cattle

1. There are two types one with red coat (with red colour hair) and other with white coat (with white hair). When red cattles (RR) are crossed with white cattles (WW), F₁ hybrids (RW) are roan.
2. Roans have the mixture of red and white colour hair. Thus both the traits are expressed equally. In F₂ generation red (RR), roans (RW) and white (WW) are produced in the ratio 1 : 2 : 1. Thus in Co-dominance, the genotypic and phenotypic ratios are identical.