Each child born to a particular set of parents has probability 0.25 of having blood type o. if these parents have 5 children, what is the probability that exactly 2 of them have type o blood?


Answer 1
Answer: Use binomial distribution with p=0.25, n=5, x=2
P(X=x)=C(n,x)p^x (1-p)^(n-x)

P(X=2)=C(5,2) 0.25^2 0.75^(5-2)

So the probability of 2 of 5 children having type-O blood from these parents is 0.26367.

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The theory of endosymbiosis suggests that mitochondria evolved from small prokaryotes that once lived within larger host cells. Structurally, mitochondria are similar to modern-day prokaryotes in several ways, that include all BUT the presence of A) ribosomes. B) chromosomes. C) Ribonucleic Acid. D) a double membrane system.


Yes That is true and I’m not too sure what else you could get from it?

Compare and contrast type 1 and type 2 diabetes


Type 1 diabetes: Its a chronic condition in which the pancreas produces little or no insulin.  The symptoms include: increased thirst, frequent urination, hunger, fatigue, and blurred vision. This can be cured if treated propertly.

Type 2 diabetes: A chronic condition that affects the way the body processes blood sugar (glucose). the symptoms are the same as Type 1 but sometimes for type 2 you won't be able to feel any symptoms. 

Hope this helped :) 


In type 1, the body does not produce insulin.

In type 2, the body does produce insulin, but the body’s cells do not recognize its presence or the body doesn’t produce enough insulin.

Type 1 is diagnosed in children and is fairly rare.

Type 2 is the most common type of diabetes.


Explain how the hardy-weinberg equation allows us to find evidence of evolution. b.could processes other than natural selection result in deviation from the hardy-weinberg equilibrium? list and explain each one:
c.define what the process is and
d.the effect it has on the allele frequency.


A population evolves whenever occurs a deviation from the H-W equilibrium. Apart from Natural Selection, Genetic drift and Gene flow lead to evolution. They change allelic frequencies through generations.


Populations that are in H-W equilibrium will get the same allelic frequencies generation after generation.

The sum of allelic frequencies equals 1, this is p + q = 1

And the sum of genotypic frequencies also equals 1, this is

p² + 2pq + q² = 1


  • p the dominant allelic frequency,
  • q the recessive allelic frequency,
  • p² the h0m0zyg0us dominant genotypic frequency
  • q² the h0m0zyg0us recessive genotypic frequency
  • 2pq the heter0zyg0us genotypic frequency

Any deviation from this value suggests that something is going on that is breacking equilibrium. This is, if

  • p + q ≠ 1
  • p² + 2pq + q² ≠ 1

When a population is not in H-W equilibrium, we can assume it is evolving. Evolution is going on.

So, the evidence of evolution is that the hardy-weinberg equation does equal one. The result of the addition differes from one.

Different processes can lead to evolution. Appart from Natural Selection, we might mention

  • Genetic drift
  • Gene flow


  • Genetic drift is the random change that occurs in the allelic frequency of a population through generations.

  • The magnitude of this change is inversely related to the size of the original population.

  • These changes produced by genetic drift accumulate in time.

  • Eventually, some alleles get lost, while some others might set.

  • Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure -bottleneck effect- or because of a population split -founder effect-.


  • Gene flow takes place whenever there is a migration of individuals between two populations and successful reproduction.

  • It involves an interaction between the dispersion pattern and the reproductive system.

  • Gene flow is an evolutive force when occurs a change in the allelic frequency through generations. This is, the allelic and genotypic frequencies change from one generation to the other.

  • Gene flow acts homogenizing the allelic frequencies between the two populations, and it might introduce variability into the new one.

  • The bigger the difference in allelic frequencies between populations is, the bigger is the effect of the gene flow.


Related link:




The answer is C. define what the process is.

Briefly explain why experiments having faulty design or inconsistent data are problems for scientists. List several reasons.



Conclusions can’t be trusted.

Experiment may not be repeatable.

Data may be incorrect.

Data may not reflect actual situation.

Data may not answer question asked.

Results may be biased.


because i gotchu sis!

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