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Presentation8 - A rat somatic cell has 42 chromosomes. If...

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A rat somatic cell has 42 chromosomes. If all of the genes were mapped, how many maps would there be?
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A rat somatic cell has 42 chromosomes. If all of the genes were mapped, how many maps would there be? Answer: 21
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In Drosophila, the dominant Bar eye ( B ) gene is at position 57.0 on the X chromosome and the recessive carnation eye ( car ) is at position 62.0 on the X chromosome. How many of the various types would be expected among 1000 offspring resulting from the following mating? X B car + + + car female male
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Answer: Females B +/+ car 237.5 + car/+ car 237.5 B car/+ car 12.5 + +/+ car 12.5 Males B +/ Y 237.5 + car/ Y 237.5 B car/ Y 12.5 + +/ Y 12.5 Females and males B + 475 + car 475 B car 25 + + 25
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Use the following distances between individual pairs of genes to construct a map of the chromosome: r – c = 10 cM c – p = 13 cM p – r = 3 cM s – c = 18 cM s – r = 8 cM
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Use the following distances between individual pairs of genes to construct a map of the chromosome: r – c = 10 cM c – p = 13 cM p – r = 3 cM s – c = 18 cM s – r = 8 cM Answer: s c r p 5 3 10
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Presentation8 - A rat somatic cell has 42 chromosomes. If...

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