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kati45 [8]
2 years ago
6

I will give 5 stars, thanks and brainliest!! :)

Biology
1 answer:
irina [24]2 years ago
4 0

Answer:

Explanation:

  • the drugs are first tested through human cells which then many of the substances fail this test
  • Then the drugs are then taken to animals for further testing
  • Once the test on animals is over, health voluteers then aid scientists or chemists in checking whether the drugs are good for humans or not
  • I REALLY HOPE THIS WAS USEFUL TO YOU
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Help with question 14 please
serg [7]

Answer:

You should say NO in a firm voice because they will know that you are positive in your decision and hopefully they will leave you alone. If they don't then that is when you start taking other steps in order to avoid peer pressure. I hope this helps!

-Please mark as brainliest!-

4 0
3 years ago
The genes R, E and D are independently assorting and control production of red pigment as follows (recessive alleles are not fun
Alona [7]

Answer:

1/8

Explanation:

An individual must have all three dominant alleles to be red, in homozygosis or heterozygosis (R_E_D_).

<u>The parental cross was:</u>

RREEDD x rreedd

F1: RrEeDd

<u>The test cross</u> is between the RrEeDd indiviudals and homozygous recessive rreedd.

The genes assort independently, so we can use Mendel's law of segregation to predict separately for each gene the proportion of the offspring that will have the dominant alleles.

<h3><u>Rr x rr</u></h3>

1/2 Rr

1/2 rr

<h3><u>Ee x ee</u></h3>

1/2 Ee

1/2 ee

<h3><u>Dd x dd</u></h3>

1/2 Dd

1/2 dd

Genes are independent, so the probability of having a R_E_D_ offpsring is calculated by multiplying the individual probabilities of having a dominant allele for each gene:

1/2 (Rr) × 1/2 (Ee) × 1/2 (Dd)= 1/8

8 0
3 years ago
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