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
valkas [14]
3 years ago
15

A gene on human chromosome 15 is expressed throughout the body. However, in the brain, only the maternal copy of the gene is exp

ressed, whereas the paternal copy of the gene is silent and not transcribed. What accounts for this pattern of expression this gene displays in the brain?
a) In the brain, the maternal copy of the gene is methylated whereas the paternal copy is un-methylated.
b) The copies of this gene in brain cells are coordinately controlled with the copies of the gene in body cells.
c) Through genomic imprinting, methylation regulates expression of the paternal copy of the gene in the brain.
Biology
1 answer:
lord [1]3 years ago
6 0

Answer:

C) Through genomic imprinting, methylation regulates expression of the paternal copy of the gene in the brain.

Explanation:

The pattern of gene expression wherein either paternal or maternal gene is expressed in specific cells while the other one is prevented from expression is known as genomic imprinting.

In the given example, the maternal copy of the gene on chromosome 15 is expressed in brain cells while its paternal copy is not expressed in these cells. Hence, the pattern of expression of this gene is regulated through genome imprinting. One of the mechanism is methylation of cytidine residues of CpG islands of the DNA that are more frequently present within promoters of the genes.

When the cytidine residues of these sequences are methylated into 5-methylcytidine, the transcription factors do not bind to these promoters preventing the expression of these genes.

Hence, methylation of cytidine residue in CpG islands of the promoters of the gene present on chromosome 15 could have silenced its expression in brain cells.

You might be interested in
True or false air masses are moved by the global wind currents
WINSTONCH [101]
The answer is, "True". 
8 0
3 years ago
Unlike sexual reproduction, vegetative reproduction
Svetradugi [14.3K]
A. Requires flowers (vegetative id related to flowers.)
8 0
3 years ago
How many species of organisms are estimated to inhabit the Earth
tatiyna

Answer:

8.7 million

Explanation:

About 8.7 million (give or take 1.3 million) is the new, estimated total number of species on Earth -- the most precise calculation ever offered -- with 6.5 million species on land and 2.2 million in oceans.

6 0
3 years ago
Read 2 more answers
A recent study found that a relatively ____________ walking program of 12 weeks for men between 63 and 72 years of age brought a
BigorU [14]

he is right its short term,

BUT YOU SHOULD MAKE ME BRAINLIEST NOT HIM!!!

>:D

4 0
3 years ago
Which two components make up the greatest percentage of the atmosphere
Dovator [93]
Nitrogen and Oxygen make up the greatest percentage of the atmosphere.

Hope I helped love! <3
6 0
3 years ago
Read 2 more answers
Other questions:
  • Research in behavioral genetics has shown that identical twins reared apart often have similar personality traits. this result s
    14·1 answer
  • Do prokaryotes cells have a nuclear membrane
    7·1 answer
  • A teacher gave the lab group shown below an “unsafe practice” warning. What is most likely the basis for the teacher’s warning?
    14·2 answers
  • What is plate motion?
    11·1 answer
  • If you set up an experiment and the results do not support your hypothesis what should you conclude. You should give up on resea
    15·2 answers
  • Which of the following is true about photoreceptors?
    7·1 answer
  • What is the complementary dna strand to the following dna strand:tatgccgtatgc?
    5·1 answer
  • What elements cycle between living and non living organisms?​
    5·1 answer
  • Where are the bound ribosomes found?
    13·1 answer
  • as-120 overcomes resistance to atp-competitive fgfr inhibitors in patients with fgfr2 fusion–positive intrahepatic cholangiocarc
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!