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il63 [147K]
3 years ago
14

Question 1 of 10

Biology
1 answer:
REY [17]3 years ago
6 0

Answer:

B. He has no E alleles.

Explanation:

In order for the boy to have an attached earlobes phenotype, he must have no E alleles, because the E is dominant. So his genotype must be ee. If he has even just a single E allele (like Ee) he will have detached earlobes, because the dominant trait will mask the expression of the recessive trait.

Why not A or D: Heterozygous Ee (one of each allele) would result in detached earlobes.

Why not C: If he has no recessive alleles, EE, he would have detached earlobes.

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The correct answer is d. 3.5 billion years.

Prokaryotes were the first forms of life on Earth long before simple multicellular life appeared because of their ability to withstand extreme conditions. It is believed that the first living forms were bacteria combined with archaea in the microbial mat (multi-layered sheet).


4 0
3 years ago
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What is an example of active transport
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Answer:

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Which statement provides the best description of the interphase portion of the cell cycle?- Interphase is a resting stage prior
stiks02 [169]

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