BIOL 3300 Lecture 2: 01.12.2017
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18 Jan 2017
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(Problem 22c, part 1) Fine spines (s), smooth fruit (tu), and uniform fruit color (u) are three recessive traits in cucumbers, the genes of which are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in a testcross, and the following progeny are produced from this testcross:
S | U | Tu | 2 |
s | u | Tu | 70 |
S | u | Tu | 21 |
s | u | tu | 4 |
S | U | tu | 82 |
s | U | tu | 21 |
s | U | Tu | 13 |
S | u | tu | 17 |
Total | 230 |
What is the coefficient of coincidence?
(Problem 22a) Fine spines (s), smooth fruit (tu), and uniform fruit color (u) are three recessive traits in cucumbers, the genes of which are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in a testcross, and the following progeny are produced from this testcross:
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Determine the order of these genes on the chromosome and the distance between them. | |||||||||||
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