D) 75% E)100% 12) Which of the following statements describes the chromosome the
ID: 220012 • Letter: D
Question
D) 75% E)100% 12) Which of the following statements describes the chromosome theory of inheritance as expressed in the early twentieth century? A) Individuals inherit particular chromosomes attached to genes. B) Mendelian genes are at specific loci on the chromosome and in turn segregate during meiosis. C) No more than a single pair of chromosomes can be found in a healthy normal cell. D) Natural selection acts on certain chromosome arrays rather than on genes. 13) Which of the following statements best describes the SRY gene? A) It is a gene present on the X chromosome that triggers female development. B) It is an autosomal gene that is required for the expression of genes on the Y chromosome. C) It is a gene region present on the Y chromosome that triggers male development. D) It is an autosomal gene that is required for the expression of genes on the X chromosome. 14) Which of the following statements correctly describes linkage? A) The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them. B) The observed frequency of recombination of two genes that are far apart from each other has a maximum value of 100%. C) All of the traits that Mendel studied-seed color, pod shape, flower color, and others-are due to genes linked on the same chromosome. D) Linked genes are found on different chromosomes. 15) One map unit is equivalent to which of the following values? A) the physical distance between two linked genes B) 1% frequency of recombination between two genes C) 1 nanometer of distance between two genes D) the distance between a pair of homologous chromosomes E) the recombination frequency between two genes assorting independentlyExplanation / Answer
Ans:
12) B Independent law of assortment
13) C its gene on y chromosome which determine maleness
14) A
15) B
16) D
17) C
18) D
19) B
20) B
21) A
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