9) In meiosis, how does prophase I difter from prophase 1 A) During prophase I t

Question

9) In meiosis, how does prophase I difter from prophase 1 A) During prophase I the nuclear envelope bresks op. during prohae t the envelope breaks up during prophase II the maclear envelope remains intact B) During prophase C) During prophase I there is one diploid cell, during prophase 11 there are two haploid cells D) In prophase I the sister chromatids are attached, in prophase II the sister chromatids are separated E) During prophase I chromosomes line up single file in the middle of the cell, during prophase ll the chromosomes line up in double file in the middle of the cell 10) 10) Crossing over during prophase I results in A) reciprocal translocation B) duplication C) genetic recombination D) nondisjunction E) translocation 11) A true-breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces green seeds. The seeds of all of the oftspring are yellow. Why A) Yellow is an easier color to produce B) The yellow alele is recessive to the green allele C) The yellow allele is dominant to the green allele D) The alleles are codominant E) All of the offspring are homory gous yellow 12) Which of these crosses will only produce heterozygous offspring? 12) B) AA C) AaAa Please read the following scenario to ansuver the folowing questionls). While working with cultured mouse cells, a researcher unknowingly treated the cells with a mutagen that causes the deletion or insertion of individual nucleotides in DNA. Subsequently, she isolated and culbured a single cell from this group She noticed that the progeny of this cell were not producing a certain peotin and that this alfected their survival 13) 13) The mutation that resulted from her accident was probably Aj a loss in regulation of …ex B) one that changed the triplet grouping of the geti C) an eor in tranolation D) caused by a protein-KNAcge 1) an amino acid substitution 14) The utation would be most harmial to the cll i 14 A) deletion of a triplet near the iddle of the e C) substitation of a base pair D) a single macleoide in the midle of

Explanation / Answer

9. Option C, during prophase I, there is only 1 diploid cell whereas during prophase II, there are 2 haploid cells.

10. Option C, Cross over results in genetic recombination

11. Option C, All offsprings are yellow because yellow is the dominant allele.

12. Option B, AA x aa will produce all heterozygous offsprings.

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