Question

Red-green colorblindness is a sex-linked trait. Normal color vision results from the dominant allele (A) while red-green colorblindness results from the recessive allele (a). In the cross X(A)Y x X(A)X(a): Select one: O a. All males should be red-green colorblind, all females normal o b. males have 50% chance of colorblind, all females will have normal O c. males have 50% chance of colorblind, all females will be colorblind O d. all males have normal vision, 50% of females will be colorblind

Answer 1

Answer- B. males have 50% chance of colorblind, all females will have normal.

Genotype	Phenotype	Sex
XAXA	Normal vision	Female
XaXA	Normal vision	Female
XaXa	Colorblind	Female
XaY	Colorblind	Male
XAY	Normal vision	Male

will have normed A male with XAY vision Refer the table genotype will have normed visian hut is a carrier. Parents XAY X Axa Х > A Gameti XA X? xa A Y XA XA XAXA XAY xaxaxa XaY XA XA , XAY and XAxa Normal vision (75%) XaY Color blind male (26.1.)

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