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3 years ago

Can someone help me with this test please??

Biology

1 answer:

Amanda [17]3 years ago

3 0

Answer:

R masks —or covers— r, so it only needs one copy to express its phenotype. This means it is the <u>dominant</u> allele.

Explanation:

In genetics, alleles are the members of an allelic pair that contain the genetic information related to a specific characteristic.

The dominant allele is one whose presence is sufficient to mask the expression of a recessive allele, so the phenotype shown is the dominant one.

A recessive allele needs to be present in both components of the allele pair in order to be expressed in the phenotype.

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Answer:

The preferable word for the fill in the blanks will be - Acid rain.

Explanation:

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3 years ago

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A man heterozygous for blood type A marries a woman heterozygous for blood type B. What could be the possible blood types of the

GenaCL600 [577]

Answer:

Heterozygous A: AO (remember, O type blood is a recessive allele. It's masked by A)

Heterozygous B: BB (h0m0zygous)

AO x BB --> AB, BO

Therefore, the genotypes of their offspring will be 1 AB to 1 BO, while the phenotypes will be 1 AB blood to 1 B blood.

I hope this answer helps you find what your looking for! :)

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3 years ago

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What is a cell doing during the g1 and g2 periods

klemol [59]

Answer:

G1-preparation for DNA replication

G2-preparation for mitosis

Explanation:

Cell cycle is a process that can be divided into two major phases: interphase and mitotic phase (division). Interphase is than subdivided into G1, S and G2 phases while mitotic phases consists of prophase, metaphase, anaphase and telophase.

Phases in interphase:

G1 or Gap 1 is characterized by cell growth (cell becomes much larger), synthesis of molecules and organelles copying.
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4 years ago