Please help! I do not understand these at all. Phenotypes: Numbers Observed: spi

Question

Please help! I do not understand these at all.

Phenotypes: Numbers Observed:
spineless 321
wild 38
claret, spineless 130
claret 18
claret, hairless 309
hairless, claret, spineless 32
hairless 140
hairless, spineless 12

2. How many sets/pairs of reciprocal phenotypes are shown?_________________

3. How many mutant traits are being studied?____________________________

4. This chart represents F2 phenotypes obtained from a ____________ (choose one: single, double, triple) crossover.

5. What is the most likely allelic arrangement of the phenotypically wildtype female parent that was crossed with a male homozygous recessive for all traits?

6. What is the genetic distance between the genes claret and hairless? Show all of your work

Explanation / Answer

2) The given offsprings are as a result of three point cross. Offsprings with highest number represent parental genotypes. So, the parental genotypes are spineless with 321 offsprings and claret, hairless with 309 offsprings. The rest are reciprocal phenotypes. So, there are six or three pairs of reciprocal phenotypes.

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