Question

How will you identify that F1 hybrid is homozygous or heterozygous? Explain it with a suitable example.​

Answer 1

There are a few different ways to determine whether a F1 hybrid is homozygous or heterozygous for a particular trait.

• One way is to observe the trait itself and see if it exhibits a consistent, dominant phenotype or a mix of dominant and recessive phenotypes.
• If the trait consistently expresses the dominant phenotype, then the F1 hybrid is likely homozygous for that trait. If the trait exhibits a mix of dominant and recessive phenotypes, then the F1 hybrid is likely heterozygous.

• For example, let's say we have a F1 hybrid plant that is a cross between a purple-flowered plant and a white-flowered plant.
• If all of the F1 hybrid plants have purple flowers, then we can infer that the purple flower trait is dominant and that the F1 hybrid is homozygous for this trait.
• On the other hand, if some of the F1 hybrid plants have purple flowers and some have white flowers, then we can infer that the F1 hybrid is heterozygous for this trait.

Therefore, there are a few different ways to determine whether a F1 hybrid is homozygous or heterozygous for a particular trait.

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