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Maurinko [17]
3 years ago
13

I NEED HELP "ASAP"!!!!! PLEASE

Biology
1 answer:
Leto [7]3 years ago
3 0
A is the correct answer i know this one i had this question before
You might be interested in
Explain the role microbiologist play in researching and treating the disease
jarptica [38.1K]

Answer:

Microbiologists are essential in helping us to treat diseases. Many work as biomedical scientists in hospitals and laboratories: testing samples of body tissue, blood and fluids to diagnose infections, monitor treatments or track disease outbreaks.

5 0
3 years ago
Cystic fibrosis (CF) is one of most common recessive disorders among Caucasians it affects 1 in 1,700 newborns. What is the expe
Phantasy [73]

Answer: The expected frequency of carriers is P(Aa)=0.046.

The proportion of childs with CF is P(aa)=0.024.

25% of having a child with CF (aa).

Explanation:

Hardy-Weinberg's principle states that in a large enough population, in which mating occurs randomly and which is not subject to mutation, selection or migration, gene and genotype frequencies remain constant from one generation to the next one, once a state of equilibrium has been reached which in autosomal loci is reached after one generation. So, a population is said to be in balance when the alleles in polymorphic systems maintain their frequency in the population over generations.

Given the gene allele frequencies in the gene pool of a population, it is possible to calculate the expected frequencies of the progeny's genotypes and phenotypes. <u>If P = percentage of the allele A (dominant) and q = percentage of the allele a (recessive)</u>, the checkerboard method can be used to produce all possible random combinations of these gametes.

Note that p + q = 1, that is, the percentages of gametes A and a must equal 100% to include all gametes in the gene pool.

The genotypic frequencies added together should also equal 1 or 100%, and all the equations can be summarized as follows:

p+q=1\\(p+q)^{2}  = p^{2} +2pq+q^{2} = 1\\P(AA)=p^{2} \\P(aa)=q^{2} \\P(Aa)=2pq1

So, there are 1700 individuals and only one is affected. Since it is a recessive disorder, the genotype of that individual must be aa. So the genotypic frequency of aa is 1/1700=0.000588.

Then, P(aa)=q^{2}=0.000588. And with that we can calculate the value of q,

P(a)=q=\sqrt{0.000588}=0.024

And since we know that p+q=1, we can find out the value of p.

p+0.024=1\\1-0.024=p\\p=0.976

Next, we find out the genotypic frequency of the genotype AA:

P(A)=p=0.976\\P(AA)=p^{2} = 0.976^{2}=0.95

Now, we can find out the genotypic frequency of the genotype Aa:

P(Aa)=2pq=2 x 0.976 x 0.024 = 0.046

Notice than:

p^{2} + 2pq + q^{2} = 1\\x^{2} 0.976^{2} + 2 x 0.976 x 0.024 + 0.024^{2} = 1

Then, the expected frequency of carriers is P(Aa)=0.046

The proportion of childs with CF is P(aa)=0.024

If two parents are carriers, then their genotypes are Aa.

Gametes produced by them can only have one allele of the gene. So they can either produce A gametes, or a gametes.

In the punnett square, we can see that there genotypic ratio is 2:1:1 and the phenotypic ratio is 3:1. So, there is a probability of 25% of having an unaffected child, with both normal alleles (AA); 50% of having a carrier child (Aa) and 25% (0.25) of having a child with CF (aa).

5 0
3 years ago
Iven the equation representing a nuclear reaction in which x represents a nuclide: which nuclide is represented by x?
kaheart [24]

The nuclide represented as X is thorium and this is an alpha decay where an alpha particle is removed off.

<h3>What is nuclide?</h3>

A kind of atom or nucleus which is represented by a specific number of protons and neutrons.

The equation given represents an alpha decay. In an alpha decay, an alpha particle is removed off.

The atomic number of the parent nuclide is more than the daughter nuclide by two units and the mass number of the parent is more than that of the daughter nuclide by four units.

Thus, the x is thorium.

For more details regarding nuclide, visit:

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8 0
2 years ago
Comprehension Questions:
Annette [7]

Photosynthesis and cellular respiration are<u> chemical reactions</u> that occur in cells.

<h3>What is photosynthesis and cellular respiration?</h3>

Photosynthesis is the process of making food through carbon dioxide, water and sunlight. It is an anabolic reaction.

Cellular respiration is the process of breaking down of food molecules by oxygen. It is a catabolic reaction.

Thus, the correct option is a, chemical reaction

Learn more about cellular respiration

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8 0
2 years ago
50 points!!! Which examples describe how a plant might meet the challenge of getting and using energy? Choose all answers that a
spayn [35]

The answers are A and D

Hope this Helps,pleeeeeeeeease vote as brainliest!!!

6 0
3 years ago
Read 2 more answers
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