Answer:A
Explanation it is well thought out and it the most logical
Reaction which breaks down complex molecules into simpler ones n release energy
A (adenine), C (cytosine), G (guanine), and T (thymine) constitute the backbone of the molecule.
<span>The DNA molecule is made up of two polynucleotide strands </span>
1.What is the probability that a sperm from the father will contain the PKU allele?
Probability = ½
2.What is the probability that an egg from the mother will contain the PKU allele?
Probability = ½
3.What is the probability that their next child will have PKU?
Probability = ¼ (because each parent has ½ chance ½ X ½ = ¼)
4.What is the probability that their next child will be heterozygous for the PKU gene?
Probability = ½ (because each parent has ½ chance of donating the ‘P’ allele and ½ chance of donating the ‘p’ allele (½ x ½) + (½ x ½) = ½
