Biology, 31.07.2019 04:00 2023greenlanden

Gene flow involves the spreading of alleles to and from a population. is the flow of genes into an area whereas is the flow of genes out of an area. a) immigration, emigration b) emigration, immigration c) founder effect, bottleneck effect d) bottleneck effect, founder effect

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Answer from: jackie6852

I believe that the answer might be A. immigration, emigration I hope that this will help you

Answer from: nick4524

A) immigration, emigration

Explanation:

The gene flow can also be defined as the gene migration from one generation to another. The composition of the gene pool changes. Due to the genetic variability at the individual level the variation in the gene pool also increases. The gene flow occurs mainly because of migration of organisms from one region to another.

Immigration can be defined as the introduction of organisms in a new habitat. Emigration can be defined as the migration or departure of the organisms to a new habitat from their native habitat. Immigration will add new genes to the new habitat population gene pool. Emigration will limit the genetic variation in the gene pool.

On the basis of the above information, immigration is the flow of genes into an area whereas emigration is the flow of genes out of an area.

Answer from: Quest

the answer is a or when it says crossing over

Answer from: Quest

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

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