Answer:
Explanation:
If any recessive phenotypic individuals result from the cross, then the unknown individual must carry the recessive allele, and have the heterozygous genotype. A testcross helps reveal the genotype of an organism when that organism shows the dominant trait, such as agouti coat color in rats.
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Answer:
Through photosynthesis, organisms could use sunlight to make food from carbon dioxide and water.
They provided food for themselves
Explanation:
