27. To analyze genetic variation in populations, one approach is to consider the frequency of alleles. When calculating an allele frequency for a diploid species, how many copies of an allele are present?(A) 1(B) 2(C) 4(D) 23(E) 46

27. To analyze genetic variation in populations, one approach is to consider the frequency of alleles. When calculating an allele frequency for a diploid species, how many copies of an allele are present?
(A) 1
(B) 2
(C) 4
(D) 23

(E) 46

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統計： A(0), B(1), C(0), D(0), E(0) #3367668

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1. 題目解析題目詢問在分析二倍體物種...

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47. It is well established that developmental biology has impacts on public health. For instance, thalidomide, an anticonvulsive and antiallergic medication, was prescribed to reduce nausea or morning sickness in pregnant women. It was subsequently shown to cause severely deformed limbs (hands and feet, but reduced arms and legs) in children whose mothers took the medication. What might thalidomide do during development?(A) Cause a defect in the fertilization of an egg.(B) Severely alter blastulation in the embryo.(C) Impair neural tube formation.(D) Impair morphogenic fields within the embryo.(E) Block cell division during blastulation.

27. To analyze genetic variation in populations, one approach is to consider the frequency of alleles. When calculating an allele frequency for a diploid species, how many copies of an allele are present?
(A) 1
(B) 2
(C) 4
(D) 23

(E) 46

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