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13 May, 19:21

In pea plants, flower color is determined by gene P (allele P = purple; allele p = red). Pollen shape is determined by gene L (allele L = long pollen; allele l = round pollen).

A plant heterozygous for the dominant purple allele (P) and heterozygous for the dominant long pollen allele (L) was crossed with a plant that was recessive for both traits.

The phenotypes seen in the offspring are shown:

Purple, long 47

Red, round 47

Purple, round 3

Red, long 3

Answer Choices:

1) Genes P and L assort independently.

2) Genes P and L are close together on the same pair of homologous chromosomes.

3) Genes P and L are far apart on the same pair of homologous chromosomes.

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Answers (1)
  1. 13 May, 20:00
    0
    2)

    Explanation:

    given

    In pea plants, flower color is determined by different genes,

    allel P = purple;

    allele p = red;

    allele L = long;

    allele l = round

    P is dominant on p and L is dominant on l.

    Parents are as given;

    PpLl crossed with ppll

    F1 generation are;

    PpLl, Ppll, ppLl and ppll,

    as given Purple, long (PpLl) = 47;

    Red, round (rrll) = 47;

    Purle, round (Ppll) = 3;

    Red, long (ppLl) = 3

    Purple, long and Red, round each are 47 in number, their genotype are same as parental genotype, so genes P and L are close together on the same pair of homologous chromosomes.
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