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In pea plants, the allele for tallness (T) is dominant over the allele for shortness (t). If two tall pea plants are crossed, can you predict the height of the offspring? Use logical reasoning to support your answer.

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It is possible to predict the probabilities of the offspring however there are actually 4 different scenarios with 2 possible outcomes. Since the tall allele is dominant and we are breeding 2 tall plants, a tall plant could have be homozygous dominant (TT) or heterozygous (Tt) but still express the Tall phenotype. So the three different scenarios would be: 1) Both parents are homozygous dominant 2) Female is heterozygous and Male is homozygous dominant 3) Female is homozygous dominant and Male is heterozygous 4) Both parents are heterozygous. The two outcomes would be if the parents are in case 1, 2, or 3 all the offspring would be tall because at least one parent would only have the possibility of producing a Tall gamete which would cause the offspring to express the tall phenotype no matter what the other gamete is. Now if the parents were those in case 4 there is a 75% chance the offspring would be tall and a 25% chance the offspring would be short which can be proven by a punnett square.
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All the offspring are tall in each case is because the allele for tallness is dominant over the allele for shortness.

According to the question, the allele for tallness (T) is dominant over the allele for shortness (t). If we have two tall plants, they could be TT or Tt. The phenotype of the offspring depends on the genotype of the plants that were crossed.

If the plants that were crossed are TT, a simple punnet square shows that all the offspring are all tall because they have the TT genotype. On the other hand. If the plants that were crossed are both Tt all the offspring are also tall. If one of the crossed plants is TT and the other is Tt, all the offspring will also be tall.

The reason why all the offspring are tall in each case is because the allele for tallness is dominant over the allele for shortness. A plant can only be short when two short plants are crossed.

Learn more: https://brainly.com/question/14191541

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