What are gametes and offspring expected in the F1 after crossing of homozygous black guinea pigs - (black is dominant) with a homozygous white - (recessive)?

Date: 2015-10-07; view: 523.

In guinea pigs, shaggy hair (R) is dominant over smooth (r).What are gametes and offspring can be expected in crosses homozygous shaggy guinea pigs with homozygous smooth-in F1 and F2?

Where p is the ideal number, which is calculated error, the difference between the expected ideal numbers and received, does not exceed the permissible error.

Calculate how many yellow and green peas will be available in your part of seeds. Record on the board obtained by each of us the number of yellow and green seeds, and their sum. Make a biometric processing of your personal material, and, after summing up the totals on the board, sum up the materials of the group.

NATURAL PEA AND MODELS

You must have a mixture of pea seeds, similar to the F2 according the experiment of Mendel. He obtained 8023 seeds, 6022of them yellow, 2001 - green. Students can distribute ½ or 1 / 3 of this amount, after mixing of them thoroughly.

To check the validity of the results use the calculation of the average permissible error - SP. First of all, in each case scanned material is necessary to calculate the ideal expected ratio. For this amount of yellow and green seeds should be divided by 4. Private will correspond to the expected number of green seeds. Quotient, multiplied by 3, gives the expected number of yellow seeds. Then make the calculation of the average error for any of the expected numbers using the formula: SP = ±

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