SOS:
The answers is:
In a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the <u><em>Heterozygous</em></u> genes cause the <u><em>Dominant</em></u> traits to mask the <u><em>Recessive</em></u> traits.
<em>Hope this helps!</em>
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Aphotic zone: It is an inky darkness that occupies the great bulk of the ocean.
Photic zone: its a surface layer that receives sunlight.
Answer:
B. It is a reflex response that causes various muscles to contract in order to move away from the object.
Explanation:
I just took the Test
I honestly have no clue sorry