In humans, "unattached" earlobes are dominant over "attached" earlobes. "Widows peak" hairline is dominant over "non-widows peak" hairline. Use E and e for the earlobe phenotype alleles, and W and w for the hairline phenotype alleles. A female and a male, both with genotype EeWw have a child. What is the probability it will be a boy, and have attached earlobes and a widows peak hairline?

Question

contestada

Respuesta :

Oseni Oseni · Answer 1 · 2020-05-12T02:51:15+02:00

Answer:

3/32

Explanation:

The probability would be 3/32

From the illustration:

EeWw and EeWw were crossed (Assuming both traits are autosomal)

EeWw x EeWw

Progeny :

1 EEWW - unattached earlobe with widows peak

2 EEWw - unattached earlobe with widows peak

2 EeWW - unattached earlobe with widows peak

4 EeWw - unattached earlobe with widows peak

1 EEww - unattached earlobe with non-widows peak

2 Eeww - unattached earlobe with no-widows peak

1 eeWW - attached earlobe with widows peak

2 eeWw - attached earlobe with widows peak

1 eeww - attached earlobe with no-widows peak

Generally, the probability of obtaining a male or a female in a cross is 50/50 or 1/2.

From the crossing result, the probability of having attached earlobe and widows peak hairline is 3/16.

Hence, the probability of obtaining a boy with attached earlobes and widows peak airline:

1/2 x 3/16 = 3/32.