Which alleles are dominant to each other in blood type inheritance?
A) Alleles IA and i are dominant to the allele IB.
B) Alleles IB and i are dominant to the allele IA.
C) Alleles IA and IB are dominant to the allele i.
D) Alleles IA, IB, and i are codominant.
C
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Eric and Janelle are carriers of the recessive allele causing Tay-Sachs disease, which is lethal in early childhood. If they have a healthy child, what is the probability that this child would NOT be a carrier of Tay-Sachs disease?
A) 1 B) 2/3 C) 1/2 D) 1/3
Plants adapted to edge environments tend to be
A) tolerant of shade and prefer moisture. B) tolerant of shade and dry conditions. C) intolerant of shade and prefer moisture. D) intolerant of shade and tolerant of dry conditions.
On a hot, dry day, plants close their stomata to conserve water. What impact will this have on photosynthesis?
What will be an ideal response?
Which of the following is true of healthy G1 cells?
a) The p53 protein is found at very high levels. b) The probability of apoptosis in these cells is very high. c) The p53 protein is found at very low levels.