NEET Biology question
The leaf colour of certain plants is controlled by one gene. For that gene, the allele = orange and = green. You have a plant with orange leaves, but do not know whether that plant's genotype is or . If you cross your unknown plant with one of the plants whose genotype is listed below, you will be able to determine your unknown's genotype. With which plant would you cross it?
Solution
To determine whether a dominant-phenotype individual (orange leaves) is homozygous () or heterozygous (), it must be crossed with the homozygous recessive (, green leaves) — a test cross. If the unknown is , all offspring of this cross will be orange (); if the unknown is , the offspring
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