gentics punntte question

Question

The colour of feathers in birds is often determined by genes that exhibit incomplete dominance. For example, the gene for black fathers (B) may be incompletely dominant to the gene for white feathers (W).Determine the genotypic and phenotypic ratio that will result from when two gray feathered parents mate.

Answer 1

If two gray birds mate, then that means they both have B and W traits:

 

  | B  |  W |

  |----------|

B|BB | BW|

  |----------|

W|BW|WW|

  |----------|

 

BB -- 1:4 and black

BW -- 2:4 and gray

WW -- 1:4 and white