1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gulaghasi [49]
3 years ago
13

Scientists discovered that the difference between blond and dark hair comes down in part to a single nucleotide difference in th

e DNA sequence of an enhancer that lies more than 350,000 base pairs away from the gene it controls. On average, blonds transcribe this gene less efficiently than people with dark hair. How can a tiny difference in a distant enhancer make a blond?
Biology
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

The answer is given below.

Explanation:

A tiny difference in a distant enhancer make a blond through DNA Looping.

DNA Looping can bring the enhancer bound by an activator physically closer to the promoter even if the enhancer is located far away along the DNA molecule.

DNA Looping.

When a protein or a set of complex proteins binds to 2 different sites of DNA simultaneously while looping out the interfering DNA.  

Important of DNA Looping

  • It regulates metabolism of DNA
  • it is involved in transcriptional initiation of prokaryotic operons.

You might be interested in
Which, if any, of the blood samples tested can be patient with Type B+ blood recieve?
seropon [69]

Answer:

Type B+ can only receive blood from a donor that has blood type B and AB with Rhesus positive or negative.

Explanation:

The blood group system classification is based on the presence or the absence of antigens on the surface of the red blood cells. thus the blood group system is divided into four main blood group types/antigens present. During blood transfusion, the donated blood must be compatible with the patient blood type.

In blood transfusion, patient who is Rh positive can receive blood from donor who is Rh negative, but those with negative blood types cannot receive from anyone with a positive blood type but only the Rh- blood.

Donors with blood type A can donate blood to recipients with blood types A and AB

Donors with blood type B can give blood to recipients with blood types B and AB

Donors with blood type AB can donate to recipients with blood type AB only

Donors with blood type O can give blood to recipients with all blood types A, B, AB and O.

6 0
3 years ago
Read 2 more answers
In how many instances are the atomic weights of the elements out of order relative to the atomic numbers of the elements?
lina2011 [118]
I am not to sure that I understand the question. But it would be impossible for an element to have an atomic mass less than it's atomic number...if it did then it would be a different element.
4 0
3 years ago
Animals behave in order to satisfy needs.
Debora [2.8K]
Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system.
7 0
4 years ago
Read 2 more answers
“PKU” is an inherited disease caused by a recessive allele. If a woman and a man are both carriers, where P is the normal allele
user100 [1]

Answer:

Option A, 1/64

Explanation:

The genotype of a carrier female would be Pp

The genotype of a carrier male would be Pp

When these two adults are crossed , the following offspring are produced

Pp x Pp

PP, Pp, Pp, pp

Thus out of four children 3 children have normal phenotype but two are carrier.

So probability of having one normal  child (with genotype PP) is \frac{1}{4}

So the probability of  three normal children is

\frac{1}{4} *\frac{1}{4} *\frac{1}{4} \\= \frac{1}{64}

Hence, option A is correct

6 0
4 years ago
How do most of the acids in acid precipitation form?
dmitriy555 [2]

Answer:

Since rain naturally has things dissolved in it, it will always be slightly acidic. However, when rain reacts with certain air pollutants, such as sulfur or nitrogen oxides, the water vapor converts into very diluted forms of sulfuric or nitric acids.

Explanation:

Since rain naturally has things dissolved in it, it will always be slightly acidic. However, when rain reacts with certain air pollutants, such as sulfur or nitrogen oxides, the water vapor converts into very diluted forms of sulfuric or nitric acids.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Your first biology exam is coming up in a few days, and to help you get through a late night study session you buy a package of
    9·2 answers
  • Which of the following is known as photosynthesis?
    6·1 answer
  • What is the source of the bacteria in the culture tube in model 1? 2. how many genetic variants of
    8·1 answer
  • Which of the following is true with respect to mutagens? Mutagens are chemical or physical factors that increase the rate of mut
    11·2 answers
  • Which of these is am example of chemical change
    6·1 answer
  • Mammals
    6·2 answers
  • 5. High-pressure systems are usually not associated with
    7·2 answers
  • What Crime lab unit will the blood evidence be delivered to?
    8·1 answer
  • 51. Anaerobic respiration does not use _______ gas it happens in one process (after glycolysis) called
    6·2 answers
  • Which of the following is an intrusive igneous body?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!