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Molodets [167]
3 years ago
14

Which step in transcription occurs first

Biology
2 answers:
Svetradugi [14.3K]3 years ago
9 0

Transcription Initiation. The first step in transcription is initiation, when the RNA pol binds to the DNA upstream (5′) of the gene at a specialized sequence called a promoter (Figure 2a). In bacteria, promoters are usually composed of three sequence elements, whereas in eukaryotes, there are as many as seven elements ...

Blababa [14]3 years ago
5 0

Initiation. The DNA molecule unwinds and separates to form a small open complex. ...

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Who first identified nucleic acids, and where were they discovered?
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Answer:

A

Explanation:

He discovered them in 1868. I hope this helps:)

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The _____ of a fish helps it move up and down in the water.
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One of the monosaccharides is a building block of a plant's cell wall. It is
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If the stem of a plant is bent or snapped, why does the part above the bend usually die, even if it is propped up with a support
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3 0
3 years ago
What is the probability that the first offspring from the cross listed below will be heterozygous for all loci?
Tanya [424]

Answer and Explanation:

<u>Cross:</u> aa Bb dd Ee x AA bb Dd Ee

We can calculate the probability of getting heterozygous individuals in the progeny by using the <u>product rule</u>. Assuming that these four genes <u>assort independently</u> (<em>events that occur independently from each other</em>), we can infer that the F1 will have the next genotypic proportions for each gene:

1) aa     x     AA

F1) 4/4=1 Aa

2) Bb    x    bb

F1) ½ bb

     ½ Bb

3) dd    x    Dd

F1) ½ dd

     ½ Dd

4) Ee    x    Ee

F1) ¼ EE

    2/4 = ½ Ee

     ¼ ee

So, to know what the probability is that the F1 of being heterozygous for all loci, we must multiply the respective individual probabilities of getting a heterozygous genotype, like this:  

1 Aa   x   ½ Bb   x    ½ Dd    x    ½ Ee = 1/8 AaBbDdEe

                                 

6 0
3 years ago
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