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Biology 20 Online
OpenStudy (anonymous):

A heterozygous plant is crossed with a short plant. What are the genotypes of the offpsring and how often do they occur

OpenStudy (anonymous):

I know the genotypes are Tt and tt but I don't understand what they mean by how often do they occur

OpenStudy (anonymous):

The question is asking about the chances of offspring produce which is two of Tt and two of tt so the chance is 50:50 that is 1:1

thomaster (thomaster):

Heterozygous = 2 different alleles Homozygous = 2 of the same alleles. The short plant is usually heterozygous for the recessive trait (short), which is indicated with a lowercase letter (t) So the genotype of the short plant is tt Heterozygous for 1 trait means 2 different alleles, 1 dominant (uppercase letter) and 1 recessive allele (Tt). To find out what the offspring is, you draw a punnett square. I'll draw one for example:|dw:1406070011054:dw| So the 2 different genotypes of the offspring are Tt and tt, which occur equally. So a 1:1 ratio.

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