Bob and Mary both suffer from Sickle Cell Disease, an autosomalrecessive condition (they have the condition - they are not justcarriers). They met in a support group and against their doctor'sadvice, decide to have a child. What is the probability that theirchild will NOT have Sickle Cell Disease?

		33%
		0%
		75%
		50%
		25%

1. The _____ checkpoint can only be passed if the rightgrowth factors have been received from other cells

   		G1/S
   		G2
   		G2/M
   		S

The protein hemoglobin, which carries oxygen in red blood cells,is a protein complex that consists of 4 separate subunits encodedby 2 genes: One gene encodes the two alpha-globin subunits whilethe other encodes the two beta-globin subunits. Four functionalsubunits (2 of each kind) are needed for a functional complex.

If a person carries just one mutant allele for alpha-globin, anycomplexes containing a copy of the mutant protein arenonfunctional, even if the other alpha-globin subunit is normal. Asa result, almost all the hemoglobin produced is nonfunctional.

This is an example of a     mutation.

		leaky / hypomorphic
		gain of function / neomorphic
		gain of function / hypermorphic
		dominant negative / antimorphic

What gametes are possible from the parental genotype XXYyZz?

SELECT ALL THAT APPLY, but be aware that incorrect choices countagainst you.

		XYZ
		XYz
		XyZ
		xYZ
		xxyyzz
		xYz
		Xyz
		xyz