When you perform a three-point test cross to determine the linkage between three genes, you found that distance between the three genes were 16 and 8 map units. Of 1000 progeny produced in the test cross, you observe 7 double recombinants. What is the interference?
a. 0.547
b. 0.453
c. 0.16
d. 0.08
e. 0.0128
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Ответ:
The correct option is b. 0.453
Explanation:
To calculate the coefficient of coincidence, CC, we must use the next formula:
CC= observed double recombinant frequency/expected double recombinant frequency
Note:
• Observed double recombinant frequency=total number of observed double recombinant individuals/total number of individuals
• Expected double recombinant frequency: recombination frequency in region I x recombination frequency in region II.
CC= (7/1000)/0.16x0.08
CC= 0.007/0.0128
CC=0.5468
The coefficient of interference, I, is complementary with CC.
I = 1 - CC
I = 1 - 0.5468
I = 0.4531
Ответ:
Explanation:
Pollen grains are the male gametes in plants. It is present on the anthers. Pollen grains finds its way to the ovule by the process of pollination. The structure of pollen grains vary from one species of flower to another. The hibiscus and spider lily both have circular pollen grain.
However, the atomic structure of pollen grain of hibiscus represents the Buckminster fullerene but is not shown in spider lily. The pollen grains of hibiscus have spikes on its surface.