Genes A, B, C, D, and E are linked on a chromosome and o...

Question

Genes A, B, C, D, and E are linked on a chromosome and occur in the order given.

The test cross indicates the genes recombine with a frequency of 28%. If 1000 progeny are produced by this test cross, determine the number of progeny in each outcome class.

Accepted Answer

Hi, everyone. Welcome back. Let's look at our next problem. It says the frequency of recombination between genes A and B is 24%. And the following cross was done big. A little B slash little A big B crossed with little, a little B slash little A little B. If 2000 progeny are produced from this cross, determine the number of recombinant progeny. And we have choice A zero choice B choice C 480 or choice D 720. Well, we might be tempted to dive in and look at the genotype we're given for the two parents and try and figure out what the parental versus recombinant gas might be. But we don't have to do any of that because we're given the recombination frequency and ask for how many recombinant progeny there are. And if we recall from our content video, the definition of recombination frequency Is the number of recombinant offspring divided by the total number of offspring times 100%. So we have the recombination frequency of 24 and we know how many total progeny there are. So the number of recommit progeny, We would take our total number of progeny, 2000 timed or multiplied by. And we take our recombination frequency in percent and convert it to a fraction. So we have, as we said, 2000 multiplied by, and that would be 24 Divided by and that will equal 480 recombinant progeny, Which is found in Choice C 480. So it's a good lesson that sometimes we get some extraneous information in our problem that makes it look more complicated than it is. So again, we have a recombination frequency between genes A and B of 24%. And we are given that there are 2000 progeny and asked what the number of recombinant progeny are. And it's choice C 480. See you in the next video.

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Genes A, B, C, D, and E are linked on a chromosome and occur in the order given.

The test cross indicates the genes recombine with a frequency of 28%. If 1000 progeny are produced by this test cross, determine the number of progeny in each outcome class.

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Chemistry

Biology

Math

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Genes A, B, C, D, and E are linked on a chromosome and occur in the order given.The test cross indicates the genes recombine with a frequency of 28%. If 1000 progeny are produced by this test cross, determine the number of progeny in each outcome class.

Genes A, B, C, D, and E are linked on a chromosome and occur in the order given.

The test cross indicates the genes recombine with a frequency of 28%. If 1000 progeny are produced by this test cross, determine the number of progeny in each outcome class.