All of the offsprings produced in a cross involving a brown mink and a silver -blue mink are brown. When these brown mink offsprings wee crossed with each other, the ratio of brown to silver blue was 3:1. he results of these crosses are best explained by

A black mouse mates with a brown mouse, and all the offsprings are back. (a) Why are no brown offsprings produced ? (b) If two of the black offpsrings mate with each other what kind of offspring would you expect and in what proportions ? Give reason for your answer.

In man brown eyes are dominant over blue eyes. A blue eyes mother and brown eyed father have 50% blue eyes and 50% brown eyes childred. What type of cross it involved?

In man brown eyes are dominant over blue eyes. A blue eyes mother and brown eyed father have 50% blue eyes and 50% brown eyes childred. What type of cross it involved?

In man brown eyes are dominant over blue eyes. A blue eyes mother and brown eyed father have 50% blue eyes and 50% brown eyes childred. What type of cross it involved?

In man brown eyes are dominant over blue eyes. A blue eyes mother and brown eyed father have 50% blue eyes and 50% brown eyes childred. What type of cross it involved?