Interestingly Aggiesrus same organism as described in questi

Interestingly, Aggiesrus (same organism as described in question 2) females are the heterogametic sex with the sex chromosome genotype UC and males are the homogametic sex with the sex chromosome genotype CC. If a white-fur, short tail male is crossed to a yellow-fur, long tail female the following F1 are observed: 51 long-tail, yellow fur males 49 short-tail, yellow fur females What are the parent and progeny genotypes based on the combined information given in question 2 and this question? (assume all parents are true breeding) yytt male x YYTT female YyTt males and Yytt females yyC^t U male x YYC^T C^T female YyC^T U males and YyC^t C^t females YYC^t C^t males x yyC^T C^T female YyC^T U males and YyC^t C^t females yyC^t C^t males x YYC^T C female YyC^t C^T males and YyC^t U females yyC^t C^t male x YYC^T U female YyC^t C^t males and YyC^T U females

Solution

Heterogametic female for UC

Homogametic male CC

White fur, short tail male yyC^tC^t        x          YYC^TUyellow fur, long tail female [parents]

51 long tail yellow fur male YyC^TC^t             and

49 short tail yellow fur female YyC^tU                       [progenies]

If all parents are true breeding: Yellow(Y) color is dominant and C^t is recessive for long tail C^T. the male should have C^tC^t because they are true breed and short tail. The long tail allele is not present in U chromosome.

So the option 4 is correct.