Anonymous
Anonymous asked in Science & MathematicsBiology · 1 decade ago

In pea plants, purple flower color is dominant to white flower color. If two pea plants that are true-breeding?

for white flowers are crossed, in the offspring:

a) all of the flowers will be purple.

b) three-quarters of the flowers will be purple and one-quarter will be white.

c) half of the flowers will be purple and half will be white.

d) one-quarter of the flowers will be purple and three-quarters will be white.

e) all of the flowers will be white.

4 Answers

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  • 1 decade ago
    Favorite Answer

    Let's put this into view...

    Let's make the symbol to be P:

    ~P: Dominant (Purple flowers)

    ~p: Recessive (white flowers)

    -The genotypes that will give you purple flower phenotypes will be Pp and PP.

    -The only genotype that will give you white flowers is pp.

    *The key word in the question is "true-breeding" meaning that they are homozygous for one genotype. It's also a given since they also tell you that both parents are white flowers.

    *Thus it will be pp x pp.

    Make a punnett square. You will see that all of the offspring will have the pp genotype meaning that all of the offspring will have the phenotype of white flowers.

    Hope this helps. :)

    Source(s): Second year Bio major
  • Anonymous
    1 decade ago

    All of the flowers will be white. Since white color is recessive, then both white plants will have the same genotype (ww). Thus, they can only produce white offspring.

  • Anonymous
    4 years ago

    by way of the way, osmosis is the diffusion of water. Meiosis is the splitting of intercourse cells and how they divide to produce a million/2 the style of chromosomes than a somatic cellular. :P

  • 1 decade ago

    e) - true breeding means they are homozygous.

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