Question

In a particular plant species, majority of the plants bear purple flowers and very few plants bear white flowers. No intermediate colours are observed. If you are given a plant with purple flowers , how would you confirm that it is a pure breed for trait? Explain .​

Answer 1

Answer:

If we are given a purple flower......then we can easily determine whether it is homozygous or heterozygous..or it is dominant or recessive....

We just cross the plant with a plant of the same species having homozygous recessive characters....This is called test cross...

If the progenies obtained are all purple ....the it'll be confirmed that the parent was pure breed...

Answer 2

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You need to go for a test cross. Take the purple flowered plant and cross it with a homozygous recessive plant. If you get all purple coloured flowers, then it is a pure breed, i.e., a homozygous dominant. If you get purple:white in the ratio 1:1, then it is a heterozygous plant.

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