Question

1. Nystagmus, a condition causing oscillations in eye movement, is inherited with the dominant allele N on the X chromosome. The X-linked recessive allele n does not cause Nystagmus. An immunodeficiency disorder called Chronic Granulomatous Disease (CGD) is inherited with the autosomal recessive allele g. Individuals with the autosomal dominant allele G do not have Chronic Granulomatous Disease. a. Tiffany has both Nystagmus and CGD. Her husband Todd has neither condition. Tiffany's father does not have Nystagmus. Todd's mother has CGD. For Tiffany and Todd, what is the probability that their first child will be a son with CGD but not Nystagmus and their second child will be a daughter with Nystagmus who does not have CGD and their third child will be a son with both Nystagmus and CGD? b. Out of 5 children born to Tiffany and Todd, what is the probability that 3 will be daughters with CGD who don't have Nystagmus? Jordan has CGD but not Nystagmus. His wife Jasmine has Nystagmus but not CGD. Jasmine's father has CGD but does not have Nystagmus. Out of 3 children born to Jordan and Jasmine, what is the probability that at least one will be a son with Nystagmus but not CGD? c. d. For Jordan and Jasmine, what is the probability that their first child will be eithera daughter with CGD who does not have Nystagmus or a son with neither condition?

Answer 1

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