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Dima020 [189]
3 years ago
6

The Hopi, Zuni, and other Southwest indigenous peopleshave a relatively high frequency of albinism resulting from homozygosity f

or a recessive allele, a. A normally pigmented man and woman, each of whohas an albino parent, have two children.a.What is the probability that both children are albino?b) What is the probability that at least one of the children is albino?
Biology
1 answer:
Ket [755]3 years ago
4 0

Answer:

a. Zero percent

b. Fifty percent

Explanation:

As it has been mentioned in the question that both man and woman are normally pigmented and each one have an albino parent thus both will be heterozygous and their allelic makeup will be as follows -

Man - Aa

Woman - Aa

After a cross between Aa × Aa we get the following result-

One AA, Two Aa and One aa

It is clear that only the aa type of offsprings will be albino.

Out of 4 there is probability of only one to be albino so out of two there will be 50% probability of being albino.

The probability of both sons to be albino will be zero percent.

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DNA<br>"Deoxyribonucleic<br>Acid"​
Zarrin [17]

Answer:

Details about DNA are given in the explanation section. Hope it will be helpful for you.

Explanation:

DNA, or deoxyribonucleic acid, is the hereditary element in humans and almost all other organisms. Nearly every cell in a person’s body has the same type of DNA. Most DNA is found in the cell nucleus (nuclear DNA), but a small quantity of DNA can also be found in the mitochondria (mitochondrial DNA or mtDNA).

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same type in all people.

DNA bases pair up with each other, A with T and C with G, to form units that are called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule.  A base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

A valuable feature of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases.

7 0
3 years ago
In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of allele a is 0.2. what is the
Allushta [10]
The Hardy-Weinberg equation is as follows:
( {p + q})^{2}  = 1
{p}^{2}  +2pq +   {q}^{2}  = 1
Where:
(convert all % to decimals)

p= homozygous dominant
q= homozygous recessive
pq= heterozygous

While you did not specify whether the 0.2 frequency was for dominant or recessive, we can still figure out the answer.

Using the 1st equation, we can solve for the other dominant/recessive frequency:

1-0.2=0.8

Meaning that:

p= 0.8 & q=0.2

If the heterozygouz frequency is 2pq, then it becomes a simple "plug & chug" sort of approach.

2(0.8)(0.2)= 2(0.16)= 0.32

So, the heterozygous frequency would be:
0.32

Hope this helps!
8 0
3 years ago
The organic chemicals that help cell membranes to conserve internal fluids are:
guajiro [1.7K]

<u>Answer</u>:  

The organic chemicals that helps cell membranes to conserve the internal fluids are phospholipids.

<u>Explanation</u>:

Phospholipids are used to form plasma membrane of the cell. Plasma membrane surrounds the cell contents like various cell organelles, nucleus, ribosomes and proteins. A phospholipid molecules is made up if a polar head containing a phosphate group and the two non-polar tails made of long chains of hydrocarbon of fatty acids.

The another name for plasma membrane is phospholipid bilayer. The polar head is hydrophilic that interactes with polar environment while facing outside the bilayer while the non-polar tail is hydrophobic in nature which makes the internal hydrophobic region of cell membrane which faces inside the bilayer.

8 0
3 years ago
Biomes are effected by temperature and precipitation. Please choose one other abiotic factor that would
marissa [1.9K]

Answer:

climate / it would affect the distribution by affecting the soil making the species move to a different location

Explanation:

5 0
2 years ago
About two-thirds of human caloric intake consists of wheat, rice, and corn. What tissues constitute the majority of the nutritio
bixtya [17]

Answer:

Answer-(C)

Explanation:

Endosperm and female gametophyte is the plant tissue that have high nutritional value. The function of endosperm is to protect the embryo and gives all the essential nutrient to the embryo.

5 0
3 years ago
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