If several pea plants with the genotype ttyy are crossed with pea plants with the genotype ttyy, what percentage of the offspring will be expected to have the ttyy allele combination?

75%

50%

25%

40%

If several pea plants with the genotype TTYy are crossed with pea plants with the genotype Ttyy then the percentage of the offspring will be expected to have the TTYy allele combination will be 25%.

Therefore the correct answer to the question is option c.

Explanation:

When the above said genotype are crossed with each other than the percentage of desired allele combination will be one fourth or 25%. This is shown by the punnet square.

Punnett square is said to be one of the best method for determining the allele of the next generation. By the help of it we can also find out the other combination of allele that is possible to happen.  

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many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: