homozygous recessive is crossed with a heterozygote, what percent chance is there of getting a heterozygous...

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Biology

homozygous recessive is crossed with a heterozygote, whatpercent chance is there of getting a heterozygous genotype inf1?

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We can use the following Punnett square to do the crossing and get the results. Let aa is the recessive homozygote and Aa is heterozygote.

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â lÂ Â Â a Â Â lÂ Â aÂ Â l

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â A l Aa l Aa l

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â a l aa l aa l

Now, we see that of the above four offsprings of generation F1, two are heterozygous. Therefore, percent chance of getting a heterozygote in this cross is 50%.

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