The phenotypes seen in the offspring of this testcross are shown: Purple, long 4

Question

The phenotypes seen in the offspring of this testcross are shown:

        Purple, long 47
       Red, round     47
       Purple, round        3
       Red, long      3

Required information In pea plants, flower color is determined by gene P(P-purple, p = red). Pollen shape is determined by gene L (L = long pollen; / round pollen). A plant heterozygous for the dominant purple allele (P and heterozygous for the dominant long pollen allele (L) is crossed with one that is homozygous recessive for both genes. Calculate the distance between genes Pand L in map units. Multiple Choice 94 m.u 50 m.u. 47 m.u 6m.u 3 m.u

Explanation / Answer

Answer is option number 4- 6 m.u.

Calculations:

Distance between two genes= Total no. of recombinants/ Total no. of offsprings X 100

Total no. of offsprings = 100

Total no. of recombinants = 3 + 3= 6

Distance between two genes = 6/100 X 100= 6 m.u.

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