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Question

How many genotypes are possible in F2 generation, if a character is controlled by 3 pairs of polygenes?


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Solution

Polygene:

  1. When a set of genes is expressed collectively, they form a specific phenotype or trait, but their separate effects are too small to notice.
  2. A genotype is a set of heritable genes that can be passed down from parents to offspring in an organism. A person's genotype is the combination of alleles they have for a particular gene.
  3. 3n is a general formula for the number of genotypes.
  4. In the case of three pairs of polygenes, 3n=33 =3*3*3=27

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