24. Assume that genes A and B are not linked. If the probability of allele A in a gamete is 1/2 and the probability of allele B in a gamete is 1/2, then the probability that both A and B are in the same gamete is (A) 1/2 x 1/2 (B) 1/2 + 1/2 (C) 1/2 1/2 (D) 1/2 (E) 1/2 x 1/2 25. A couple has 5 children, all sons. If the woman gives birth to a sixth child, what is the probability that the sixth child will be a son? (A) 5/6 (B) 1/2 (C) 1/5 (D) 1/6 (E) 1/64

Biology: The Dynamic Science (MindTap Course List)
4th Edition
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Chapter13: Genes, Chromosomes, And Human Genetics
Section: Chapter Questions
Problem 10TYK: You conduct a cross in Drosophila that produces only half as many male as female offspring. What...
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Do 24 and 25
5:27 4
1 Search
FI Generation Cross
F2 Generation (at least 500 flies)
Fl red-eyed females x white-eyed males 50% of females are red-eyed and 50% are white-
eyed
50% of males are red-eyed and 50% are white-eyed
21. The best explanation for the red-eyed F1 females is
(A) mutation
(B) culture contamination
(C) dominance
(D) multiple loci
(E) sex-influenced traits
22. There are white-eyed females in the F2 generation because
(A) white is a dominant allele
(B) the white allele is autosomal
(C) a mutation has occurred
(D) these F2 females have two white alleles
(E) the white allele is located on the Y chromosome
23. Which of the following best describes the mode of inheritance of eye color in the white
culture?
(A) Autosomal
(B) Dominant
(C) Located on the Y chromosome
(D) Sex-linked
(E) Lethal
24. Assume that genes A and B are not linked. If the probability of allele A in a gamete is 1/2
and the probability of allele B in a gamete is 1/2, then the probability that both A and B
are in the same gamete is
(A) 1/2 x 1/2
(B) 1/2 + 1/2
(C) 1/2 1/2
(D) 1/2
(E) 1/2 x 1/2
25. A couple has 5 children, all sons. If the woman gives birth to a sixth child, what is the
probability that the sixth child will be a son?
(A) 5/6
(В) 1/2
(С) 1/5
(D) 1/6
(E) 1/64
Transcribed Image Text:5:27 4 1 Search FI Generation Cross F2 Generation (at least 500 flies) Fl red-eyed females x white-eyed males 50% of females are red-eyed and 50% are white- eyed 50% of males are red-eyed and 50% are white-eyed 21. The best explanation for the red-eyed F1 females is (A) mutation (B) culture contamination (C) dominance (D) multiple loci (E) sex-influenced traits 22. There are white-eyed females in the F2 generation because (A) white is a dominant allele (B) the white allele is autosomal (C) a mutation has occurred (D) these F2 females have two white alleles (E) the white allele is located on the Y chromosome 23. Which of the following best describes the mode of inheritance of eye color in the white culture? (A) Autosomal (B) Dominant (C) Located on the Y chromosome (D) Sex-linked (E) Lethal 24. Assume that genes A and B are not linked. If the probability of allele A in a gamete is 1/2 and the probability of allele B in a gamete is 1/2, then the probability that both A and B are in the same gamete is (A) 1/2 x 1/2 (B) 1/2 + 1/2 (C) 1/2 1/2 (D) 1/2 (E) 1/2 x 1/2 25. A couple has 5 children, all sons. If the woman gives birth to a sixth child, what is the probability that the sixth child will be a son? (A) 5/6 (В) 1/2 (С) 1/5 (D) 1/6 (E) 1/64
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