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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Question
If two genes experience independent assortment, which assumption is most likely true?
Choose 1 answer:
A.They are located in close proximity on the same chromosome.
B.Crossing over between the genes does not occur.
C.The genes are located on different chromosomes or are far apart on the same chromosome.
D.The expression of one gene does not affect the expression of the other.
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- Two different genes are located on the same chromosome in rabbits. A particular female rabbit is heterozygous for alleles of both genes, with alleles arranged as shown in the diagram to the right. Scientists know that the two genes are on the same chromosome, but do not know their exact relative positions, as indicated by the dashed line. Suppose this female mates with a male rabbit in which the same r. chromosome pair looks like this: Which of the following statements best describes the likelihood that this pair of rabbits would have offspring with a chromosome pair that looks like this: * O More likely if the two genes are not very close together on the chromosome E-i-e R- O Not likely, because the R and e alleles are not on the same chromosome in either parent O More likely if the two genes are very close together on the chromosome O Very likely, because the random assortment of chromosomes during cell division to make sperm or eggs allows for the mixing of all allelesarrow_forwardFruitflies of genotype AABB are bred to fruitflies with genotype aabb. The F1 offspring are then bred to fruitflies of genotype aabb. The F2 offspring have the following genotypes: Aabb 14 flies AaBb 413 flies aabb 419 flies aaBb 15 flies a. Are genes A and B on the same chromosome? Yes No b. Show how you would calculate the genetic distance between genes A and B.arrow_forwardIn the fruit fly, dumpy wings (d) and purple eyes (p) are encoded by mutant alleles that are recessive to those that produce wild type traits; long wings (d+) and red eyes (p+). These two genes are on the same chromosome. In a particular lab, two researchers Walt and Jesse crossed a fly homozygous for dumpy wings and purple eyes with a fly homozygous for the wild type traits. The F1 progeny, which had long wings and red eyes, was then crossed with flies that had dumpy wings and purple eyes. Unfortunately, the progeny of this cross somehow escaped. To prevent their other projects from contamination, they decided to spend an exceptionally boring hour in the lab catching and counting the progeny and found the following: long wings, red eyes – 482 dumpy wings, purple eyes – 473 long wings, purple eyes – 23 dumpy wings, red eyes - 22 What is the genetic distance between these two loci? a. 4.5 cM b. 55 cM c. 45 cM d. 49.5 cM e. 4.7 cMarrow_forward
- In Pansies, two genes, B and D, control the synthesis of the pigments in flower petals. The biochemical pathway is shown In each case the uppercase letter codes for the wildtype enzyme and is dominant. a What color flowers, would you expect in a plant of genotype bbDD? b. What color flowers, would you expect in a plant of genotype BBdd? c. If the plants in parts a and b are crossed what color petals would the Fl plants have? gene B enzyme gene D enzyme white white purple pigment precursor intermediatearrow_forwardPart A You start your experiments with the eyeless mutation on chromosome IV. You cross the reciprocal translocation strain to the eyeless pure line to generate F, flies that are both translocation heterozygotes and Ee heterozygotes. You decide to testcross F, males and females in two separate experiments to take advantage of the fact that crossing over does not occur in male Drosophila. F, males x pure eyeless females (Note: There is no crossing over F, females x pure eyeless males (Note: Crossing over in the F, males.) Cross may occur in the F, females.) 4 eyeless, fully fertile 4 wild-type, semi-sterile 4 eyeless, semi-sterile 4 wild-type, fully fertile 4 eyeless, fully fertile 4 wild-type, semi-sterile 4 eyeless, semi-sterile 4 wild-type, fully fertile F, Progeny What can you conclude from these results? Select the two correct statements. > View Available Hint(s) O The F2 progeny in both experiments contain recombinants. O The F2 progeny contain recombinants only when F, females…arrow_forwardCreate a chromosome map for each set of three genes from the given information. b) the crossover frequency between gene X and gene Z is 8.5 %, the crossover frequency between gene Y and gene Z is 2.25 % and between gene Y and gene X is 6.25 %arrow_forward
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