The question begins on the 1st picture and ends on the second picture. In the mo

Question

The question begins on the 1st picture and ends on the second picture.

In the mouse, various coat color phenotypes have been observed. True-breeding stra agouti, brown and black were used in the crosses listed below. True-breeding strains of light agouti, Parents Fi F2 It. agouti x agouti It. agouti x brown light agouti light agouti light agouti agouti agouti 3 It. agouti: 1 agouti 3 It. agouti: 1 brown 3 It. agouti: 1 black 3 agouti: 1 brown 3 agouti: I black It. agouti x black agouti x brown agouti x black

Explanation / Answer

A) In all the crosses, the offsprings produced in F1 generation resembles one of the parent having dominant allele. In the F2 generation dominant and recessive traits are obtained in the ratio of 3:1. These results are typical of Mendelian monohybrid cross. Therefore, there is only one gene that determines the coat color.

B) There are two alleles for each strain. The genotypes of true breeding species are given below,

Light agouti is dominant over agouti, brown and black. Similarly, agouti is dominant over brown and black.

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