Homework Answers
Because Kyra`s mother had unpigmented skin that means she was suffering from albinism that means that Kyra is a carrier in any case whether the father had no albinism, a carrier of albinism or had albinism.
Kyra ( carrier of albinism and carrier of fragile X syndrome) x Randy (albinism and having no fragile X syndrome)
22 Aa + XX x 22 aa + XY
Gametes of 22Aa+ XX - 22A+ X and 22a + X
Gametes of 22aa +XY - 22a + X and 22 a + Y
| 22A+X | 22a+X | |
| 22a+X | 22Aa+XX | 22aa+XX |
| 22a+Y | 22Aa+XY | 22aa+XY |
25% daughters- carrier of albinism and Fragile X syndrome
25% daughters- albino with no Fragile X syndrome
25% sons- carrier of albinism and suffering from fragile X syndrome.
25% sons- albino and with no fragile X syndrome.
a. Kyra`s genotypes- 22 Aa + XX
b. Randy`s genotype - 22 aa + XY
c. Possible genotypes of the children are given above in the punnet square.
d.Chance of having a child with fragile X syndrome and albinism together is 0%.
e. Chance of having fragile X syndrome is 25 % in son.
Chance of having albinism is 25% in daughters.
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