Respuesta :

biologistkhan
Answer:
             The right option for the blank is only one allele.

Reason:
              In Mendel law of segregation he noticed that when dominant tall plans (TT) crossed with recessive dwarf plants (ww), all offspring in F1 generation will be heterozygous tall (Tt). It means that each allele responsible for height was transferred to offspring from each parent. 
Oseni

Only one from each pair of trait controlling factors is passed to offspring during fertilization.

  • The factors that control traits are known as genes.
  • There is a pair of factors that control each gene. They are known as alleles.
  • Alleles for each gene separate during meiosis.
  • Alleles from males and females randomly unite during fertilization.

Thus, only one of the two alleles that make up each gene is passed to offspring.

More on Mendel's law of segregation can be found here: https://brainly.com/question/23067535?referrer=searchResults

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