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kifflom [539]
3 years ago
6

Some chemical signals are received by specific target cells. what is required for reception by a target cell?

Biology
1 answer:
ad-work [718]3 years ago
5 0
Right receptor protein on the surface of the target cell or in cell plasma is required. There are three major types of receptors in cell:
1. Channel receptors- <span>neurotransmitters.</span>
2. Receptor tyrosine kinases-protein expression
3. G protein coupled receptors-<span>detect </span>substances<span> outside the </span>cell
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A scientist samples a population of butterflies and finds that 56% are heterozygous at a particular locus. If the population is
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0.44  the frequency of the homozygous individuals in this population.

What is Hardy-Weinberg principle ?

The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

From the Hardy Weinberg Law of Population and Genetics,

We have

x²+2xy+y²=1 and

x+y=1

where

x = frequency of the dominant allele in the population

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Given 2xy = 0.56

from here, y=0.28/x, (the frequency of the recessive allele ) can be obtained

we need to find 'x'

recall, x+y=1, x=1-y

substituting this gives us

y=0.28/(1-y), which becomes,

y(1-y)=0.28

y²- y + 0.28 (quadratic equation)

Solving this to find 'y' gives two imaginary values of y = 0.44 but ,

There is no imaginary solution  .

Learn more about Hardy Weinberg Law of Population

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