Part C The results of the Stern experiment supported the general idea that _____. View Available Hint(s) crossing over does not occur in males alleles of different genes assort independently genetic recombination is a result of physical exchange between homologous chromosomes only females exhibit incomplete dominance Submit
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A testcross between F1 dihybrid flies produces more offspring with both traits like those of one parent or the other than offspring with recombinant-type traits. What best explains these results? Group of answer choices A) Both of the characters are controlled by more than one gene. B) Recombination did not occur in the cells during meiosis. C) The two genes are closely linked on the same chromosome. D) The two genes are far apart or on different chromosomes.
Rupsa S.
Question 42 (2 points) Which of the following events causes recombination between linked genes to occur? Independent assortment of the genes Mutation that causes one homolog to be different from the other homolog Nonrecombinant chromosomes break and then join with one another Crossovers between the genes result in chromosomal exchange Question 43 (2 points) Two autosomal genes have a recombination frequency of 16%. Which of the following conclusions can be drawn regarding these genes? Recombination between these two genes cannot occur in the cell during meiosis The genes are located on the X chromosome The two genes are linked but on different chromosomes The two genes are closely linked on the same chromosome Question 44 (2 points) Which of the following events of meiosis I confirms Mendel's second law of independent assortment? separation of homologs at anaphase synapsis of homologous chromosomes alignment of synapsed pairs of homologous chromosomes on the metaphase plate crossing over Question 45 (2 points) A deletion on one chromosome may be associated with a _________ on its homologue. deletion translocation duplication non-disjunction inversion
Sri K.
Indicate whether each of the following statements about genetic recombination is true or false. 01. The independent assortment of traits that Mendel observed during his dihybrid crosses is due to crossing over and the independent assortment of chromosomes during meiosis. 02. Crossing over involves the physical exchange of genetic material between homologous chromosomes during Prophase I of meiosis. 03. If an odd number of crossovers (1, 3, 5, etc.) occurs between two gene loci, it leads to the production of chromosomes that are recombinant for those two loci; if no crossovers or an even number of crossovers (2, 4, 6, etc.) occur, then the chromosomes will carry the original parental combination of alleles. 04. As the physical distance separating two gene loci increases, the probability that crossing over will occur between them decreases. 05. If two gene loci are located on the same chromosome, then chromosomes that are recombinant for these two loci will be produced if an odd number of crossovers occur anywhere along the length of the chromosome. 06. When gene loci are close together on the same chromosome, the number of recombinant progeny is higher than the number of parental progeny, and the genes are said to be linked. 07. Recombination frequency equals the number of recombinant progeny divided by the number of parental progeny. 08. The distance between two linked gene loci can be determined by crossing doubly heterozygous individuals with individuals who are homozygous for both dominant alleles and then counting progeny to determine the percent recombination. 09. When constructing genetic maps, each 1% of recombination is equal to a distance of 1 map unit or 1 cM. 10. As the distance between two gene loci increases, the frequency of multiple crossovers between the two loci also increases. 11. In order for two gene loci to assort independently, they must be located on different chromosomes. 12. Because multiple crossovers do not always produce recombinant progeny, longer map distances are more accurate than shorter map distances.
Adi S.
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