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Reika [66]
3 years ago
5

I need help wz this❄❄

Biology
1 answer:
mars1129 [50]3 years ago
6 0
<h2><u><em>Answer:</em></u></h2><h2><u><em>B.winter solstice</em></u></h2><h2><u><em>also called the great conjunction(a.k.a the Christmas star)</em></u></h2><h2><u><em>Explanation:</em></u></h2><h2><u><em>the winter solstice is when the two big planets(Saturn and Jupiter) cross and make a double planet but not really and only happens every 30 or 60 years</em></u></h2><h2><u><em>and only happens on December 21 or 22</em></u></h2><h2><u><em>and is shortest day but longest night</em></u></h2><h2><u><em>brainliest plzs</em></u></h2>
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jarptica [38.1K]

Answer:

Regulatory gene

Explanation:

Transcription is one of the major processes that occurs during gene expression. It is the transfer of the genetic instructions in DNA to mRNA. A strand of mRNA is made using complementary base pairs.

However, there is need for gene expression to be regulated.

Gene regulation refers to the mechanism that acts to induce or repress the expression of a gene. These include structural & chemical changes to the genetic material, binding of proteins to specific DNA elements to regulate transcription. These proteins that influences transcription by binding to specific nucleotide sequences (DNA segments/gene) are referred to as REGULATORY PROTEINS and those involved in regulating transcription of genes are called TRANSCRIPTION FACTORS.

Regulatory proteins controls the rate and manner of gene expression by binding to specific genes, thus, making it easy or hard for RNA polymerase (enzyme that attaches to DNA to synthesize mRNA molecule) to bind to the promoter of that gene.

Transcription factors (regulatory proteins) that promote gene transcription are called ACTIVATORS while those that decrease are called REPRESSORS.

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3 years ago
Which of the following statements is a correct explanation for the observation that all offspring exhibit a phenotype for a part
bearhunter [10]

Answer:

D) Neither of the parental genes is dominate over the other.

Explanation:

<em>Since the trait on the offspring is a mixture from both parent, it means that neither of the alleles from both parents is completely dominant over the other. Instead, each of the alleles contributes equally to the trait of the offspring.</em>

This effectively explains the fact that each trait exhibited by offspring is a blend of the traits from the two parents.

The correct option is D.

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