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Naddika [18.5K]
3 years ago
10

Membrane proteins are among the most important proteins biologically because they allow cells to communicate with their environm

ents. In humans, they determine whether the immune system recognizes the cell as foreign or not and they are the targets of most pharmaceuticals. In all organisms, membrane proteins are responsible for other functions as well. One function determines when and if cell division takes place. That is
Biology
2 answers:
Delvig [45]3 years ago
7 0
One function that determines when and if cell division takes place is the activation of growth hormones.
Vedmedyk [2.9K]3 years ago
4 0

It is C on usatestprep!!!

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i believe its

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Explanation:

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Which of these processes occurs in the chloroplast of a plant leaf?
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What is the name of the round cementing material between the grains in a sedimentary rock?
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What are virus made of
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3 0
3 years ago
In the garden pea, tall vine (D) is dominant over dwarf (d), green pod (Y) is dominant over yellow (y) and round seed (W) is dom
siniylev [52]

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3/8 tall, green, round

3/8 dwarf, green, round

Explanation:

<u>The progeny which are in highest ratio represent parental plants.</u>

Here in the given question, 3 out of 8 progeny are tall, green, round and 3 out of 8 progeny are dwarf, green, round which are the highest in number so they represent parental plants. The reason behind this is that during crossing over only two non-sister chromatids undergo crossing over while two other parental chromosomes remain intact. Out of the 4 chromosome types, 2 remain the same which will result in the same type of genotype of off-springs as of parents. So even if there is 100% chance of crossing over between non sister chromatids still only 50% will be recombinants rest of the 50% will represent parental type.

Another case may be when two genes are very near to each other then it is quite possible that the genes may not undergo crossing over at all in that case there will be no recombinants at all.

So, it simply means that parentals > recombinants or the progeny which are highest in number represent parentals.

In case of unlinked genes, parentals = recombinants.  But, <u>recombinants can never be greater than parentals.</u>

6 0
3 years ago
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