One of the lesser known of those mutant superheroes, the X-Men, is Choco-Chipster, who battles enemies by hurling tasty but deadly cookies at them at supersonic speeds. The ability to both form the sweet treats and to throw them with incredible speed at his foes, as well as the amazing ability to aim the projectiles with perfect accuracy are all coded for by a single autosomal gene pair. This information indicates the gene is: (pick one) (.5)
a) dominant b) lethal c) pleiotropic d) incompletely penetrant
13) Which of the following blood transfusions would be compatible? Circle all that apply. (1)
a) AB- donor, O+
recipient b)
O+ donor, O-
recipient c)
AB+ donor, A+
recipient d)
A- donor, AB+ recipient
16) a) Why are most lethal alleles recessive? b) Why can it be difficult to breed a recessive lethal allele out of a population over time through natural selection? (1.5)
Answer C) Pleiotropic
Pleiotropism is a phenomenon where one gene controls more than one effect (or phenotype)
13) d) A- donor, AB+ recipient
16) a)Most lethal alleles (alleles that cause death of the individual carrying them) are recessive because recessive lethal alleles can survive and can be passed on in heterozygous condition (since the heterozygous individuals will not express recessive lethal allele and hence will survive to adulthood) while such a condition in not possible in dominant lethal alleles ( since dominant lethal alleles will express even in heterozygous condition and whoever carries dominant lethal allele (heterozygous or homozygous individual) will not survive to adulthood. Thus dominant lethal alleles will be bred out of the population while recessive lethal alleles remain. b) It is because recessive lethal alleles can survive in heterozygous condition ( recessive alleles will be expressed only in homozygous condition). So heterozygous carriers of lethal alleles survive in the population and will pass on the alleles to their subsequent generations.
One of the lesser known of those mutant superheroes, the X-Men, is Choco-Chipster, who battles enemies...
One of the lesser known of those mutant superheroes, the X-Men, is Choco-Chipster, who battles enemies by hurling tasty but deadly cookies at them at supersonic speeds. The ability to both form the sweet treats and to throw them with incredible speed at his foes, as well as the amazing ability to aim the projectiles with perfect accuracy are all coded for by a single autosomal gene pair. This information indicates the gene is: (pick one) (.5) a) dominant b) lethal c) pleiotropic d) incompletely penetrant Which...