In a certain breed of plants, dark green is determined by the dominant gene 'G' and light green is determined by the recessive gene 'g'. The heterozygotes show 75% penetrance. If the parental cross GG x gg was made, how many of each of the expected phenotypes will be observed in a population of 400 F2 plants

The answer is 300.

Explanation:

When we cross GG and gg, 100% of the offspring will be heterozygous. If the heterozygotes show 75% penetrance meaning that there is a 75% probability that the plant that has the G gene will actually show it in it's phenotype.

So that means that 75% of the offspring should have dark green color, which means that 300 plants will have the expected phenotype and 100 will not.

I hope this answer helps.

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explanation:

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