Wild-type eye color in mice is black. You are studying the genetics of a rare mu

Question

Wild-type eye color in mice is black. You are studying the genetics of a rare mutation that results in blue eyes. Your prior work indicates that this eye color phenotype is monogenic. You set up a large number of crosses between blue-eyed females and black-eyed males and obtain the following: 26 blue-eyed females22 black-eyed females27 black-eyed malesa) What could explain the observed frequencies or these eye color phenotypes and their distribution between males and females in the offspring produced from your crosses? (Hint: what is missing? What is the mode of inheritance?) (1pt)b) Are the blue-eyed females you used in your parental cross heterozygous or homozygous for the eye color gene? (0.5pt)c) Does the blue eye allele have a dominant or recessive effect on eye color? (0.5p)

Explanation / Answer

this obeservation shows complete dominence in which each allele express itself equally so two combinations of allele producing 3 types of phenotype.

mode of inheritance is quantitative , in this inheritance number of alleles decides the expression of character.

blue eyed females are hetrocygous producing two different alles and different eye color.

Blue color express over black so blue eye color allele is dominant.

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