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3 years ago

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Where does an embryo usually attach to its mother?

1 answer:

Dominik [7]3 years ago

4 0

The placenta is where the embryo attaches to his mother

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

lord [1]

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.

6 0

3 years ago

The way in which an animal gets food into<br> their body

klasskru [66]

Answer:

Hi, There!

The way in which an animal gets food into their body ?

<em>Prehension Is The Way in which an animal gets food into their body;</em>

<em />

<em>Below Is The Meaning of Prehension </em>

Prehension is the process of siezing or grasping or otherwise getting food into the mouth.

Therefore, I Hope this helps!

8 0

3 years ago

Read 2 more answers

Where does the mutation occur that eventually can lead to cancer in a person?

Elena L [17]

Due to extreme (too much) cell division, a mutation of cells will occur and that is the cancer within humans.

6 0

3 years ago

Sayyid drew a diagram to compare the gravitational and

Jlenok [28]

Gravitational: A.is attractive only

Electromagnetic: C.attracts and repels

Both: D.has an infinite range

Explanation:

The two forces mentioned in this problem are:

- Gravitational force: this force is the force that is exerted between any object with mass. The magnitude of the force is given by

$F=G\frac{m_1 m_2}{r^2}$

where

G is the gravitational constant

m1 and m2 are the masses of the two objects

r is the distance between the objects

This force is always attractive and it has an infinite range.

- Electromagnetic force: this is the force exerted between electrically charged objects. The magnitude of the force is given by

$F=k\frac{q_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1 and q2 are the charges of the two objects

r is the distance between them

This force is attractive when the charges have opposite sign and repulsive when they have the same sign. It also has an infinite range.

Therefore, we can conclude that:

Gravitational: A.is attractive only

Electromagnetic: C.attracts and repels

Both: D.has an infinite range

Learn more about gravitational and electromagnetic force:

brainly.com/question/1724648

brainly.com/question/12785992

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

5 0

3 years ago

Read 2 more answers

Adaptation by natural selection is the process that allows individuals to adapt to their environments.

jarptica [38.1K]

The answer is true. Adaptation allows for a better chance of survival.
Hope this helps!

4 0

3 years ago