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guajiro [1.7K]
3 years ago
14

How does the circulatory system work at the organ level?

Biology
2 answers:
miss Akunina [59]3 years ago
5 0

Answer: The heart pumps the blood

Explanation: i from k12 7th grade, and took the test!

Strike441 [17]3 years ago
4 0

Explanation:

Circulatory as the word suggests, circulates throughout the body. Circulatory system is a group of network which consist of blood, blood vessels, and the heart. This network in turn supplies the necessary tissues in the body.

The circulatory system passes through each and every organ and system in the body. Our body cells and the circulatory system are connected in such a way that the transpiration of oxygen is done in an efficient manner. Apart from this, circulatory system also plays an important role in our digestive system.

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If the frequency of the recessive allele for a gene is 0.3, calculate the expected frequency of heterozygotes in the next genera
Kisachek [45]
Q = recessive allele frequency = 0.3, and thus in H-W equilibrium there are ONLY two alleles, q (recessive) and
p (dominant). Therefore all of the p and q present for this gene in a population must account for 100% of this gene's alleles. And 100% = 1.00.
So p, the dominant allele frequency, must be equal to 1 - q --> p = 1 - q
p = 1 - 0.3 = 0.7.
Since heterozygotes are a combination of the p and q, we must again look at the frequencies of each genotype: p + q = 1, then (p+q)^2 = 1^2
So multiplying out (p+q)(p+q) = 1, we get: p^2+2pq+q^2 = 1 (all genotypes), where p^2 = frequency of homozygous dominant individuals, 2pq = frequency of heterozygous individuals, and q^2 = frequency of homozygous recessive individuals.
Therefore if the population is in H-W equilibrium, then the expected frequency of heterozygous individuals = 2pq = 2(0.7)(0.3)
2pq = 2(0.21) = 0.42, or 42% of the population.
Hope that helps you to understand how to solve population genetics problems!
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3 years ago
On average, the adult brain loses _____ percent of its weight between the ages of 20 and 90.
charle [14.2K]
The brain loses 5-10 percent of its weight between the ages 20 & 90.
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Can a person’s genotype be determined by their phenotype? Why or why not?
sasho [114]

Answer:

i hope it help

Explanation:

A person's genotype is not determined by their phenotype. The genotype is the genetic makeup of an individual and is the basic instructions for how the cell should make proteins that make up our traits. The phenotype is the physical appearance or characteristics of the person.

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it happened to me once

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