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Fofino [41]
2 years ago
11

A student claims that the Y chromosome contains the sex-determining region gene, known as the SRY gene, which causes male fetuse

s to develop testes.
Which of the following provides correct information about cell signaling that supports the claim?
A student claims that the Y chromosome contains the sex-determining region gene, known as the SRY gene, which causes male fetuses to develop testes.

The SRY gene produces a protein that binds to specific regions of DNA in certain tissues, which affects the development of these tissues.

The SRY gene produces a protein that binds to specific regions of DNA in certain tissues, which affects the development of these tissues.
A

The SRY gene produces a protein that deletes portions of the X chromosome in males so that male characteristics can develop.

The SRY gene produces a protein that deletes portions of the X chromosome in males so that male characteristics can develop.
B

The SRY gene produces an RNA segment that is exported from specific cells and targets the developing gonads.

The SRY gene produces an RNA segment that is exported from specific cells and targets the developing gonads.
C

The SRY gene is found only in tissues of the developing gonads.
Biology
1 answer:
Vlad1618 [11]2 years ago
3 0

Answer:

The SRY gene produces a protein that binds to specific regions of DNA in certain tissues, which affects the development of these tissues.

Explanation:

In humans, there are two sex chromosomes namely: X and Y chromosomes. The Y chromosome contains a gene called sex-determining region gene or SRY gene. The SRY gene undergoes genetic expression to produce SRY proteins, which is responsible for the development of male sexual characteristics (testes) in humans.

The SRY protein achieves this by binding to a specific region on the DNA of reproductive tissues and regulates the expression of certain genes i.e. the SRY protein acts as a transcription factor. These regulation causes male fetuses to develop testes and inhibits the development of female sexual characteristics like uterus etc.

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If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this could be an example of ___________. H
givi [52]

Answer:

Incomplete dominance

Co-dominance

Explanation:

Gregor Mendel discovered the principles that governs heredity, in which one of them is that an allele called DOMINANT allele, is capable of masking the expression of its variant allele called RECESSIVE allele in a heterozygous state. However, there has been genetic scenarios contrary to this his LAW OF DOMINANCE.

One of those Non-mendelian pattern of inheritance is a phenomenon called INCOMPLETE DOMINANCE, where an allele does not mask the expression of another completely, instead their combined state produces a third intermediate phenotype that is different from both parents. This is the case of the homozygous black bull mated with a homozygous white cow to produce a grey calf. The grey phenotype is an intermediate phenotype of both the black and white colours that forms due to incomplete dominance.

Another genetic scenario is called CO-DOMINANCE, where one allele is neither dominant nor recessive to the other allele, but instead both phenotypes becomes simultaneously expressed in the heterozygous offspring. In this case, the black bull and white cow were mated to form a heterozygous calf with both black and white spots.

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2 years ago
15. Sarah is a biologist who is studying a species of crab. In the wild, crabs with larger
d1i1m1o1n [39]

The correct answer is B. The percentage of crabs with large claws would increase.

Explanation:

Crabs with large claws have more chances to survive and reproduce; this biological advantage will make most of these crabs to successfully reproduce through generations and pass this feature to their offspring. On the opposite, crabs with smaller pincers do not have this reproductive or survival advantage, this implies many crabs with small pincers will not survive a long time or will not reproduce, and therefore this trait will not past to their offspring. Moreover, this situation will cause after many generations the large claws trait prevails, while the small claws trait decreases because crabs with larger claws are more suitable. According to this, it is expected the percentage of crabs with large claws would increase.

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Answer:

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Explanation:

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Madge's behavior shows that he has confused thoughts, paranoid behaviors and loss of reality, so we can say that he is likely to have schizophrenia.

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