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Artyom0805 [142]
3 years ago
9

The GART, a gene which is involved with Down syndrome, is found toward the bottom of chromosome 21. This is an example of a ____

____.
Biology
1 answer:
AnnZ [28]3 years ago
7 0

Answer: It is an example of TRISOMY 21.

Explanation:

Trisomy 21 is a genetic condition in which 21 chromosome fail to separate during the growth of egg cell and sperm which make either of the two to an extra copy of chromosome 21. This is also known as down syndrome. This lead to slow and in appropriate mental development in affected individual.

Phosphoriboglycinamide transformylase(GART) is agene found on chromosome 21, which lead to down syndrome is an example of trisomy 21.

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Be able to compare/contrast humoral immunity with cellular immunity.
aksik [14]

Solution:

The difference between them are:


The humoral system of immunity is also called the antibody-mediated system because of its use of specific immune-system structures called antibodies. The first stage in the humoral pathway of immunity is the ingestion (phagocytosis) of foreign matter by special blood cells called macrophages. The macrophages digest the infectious agent and then display some of its components on their surfaces. Cells called helper-T cells recognize this presentation, activate their immune response, and multiply rapidly. While,


The cell-mediated immune response involves cytotoxic T-cells, or killer-T cells. Body cells that have been infected by foreign matter often present components of that material on their surfaces. Killer-T cells recognize these displays and respond by ingesting or otherwise destroying the infected cell. Killer-T cells are also important in the body's defenses against parasites, fungi, protozoans, and other larger cells that might have found their way into the body. The killer-T cells recognize these large invaders by their foreign proteins and then destroy them.  

This is the required answer.

6 0
3 years ago
7. White wool (WW, Ww) and brown eyes (BB, Bb) are dominant traits in sheep, while black wool (ww) and blue eyes (bb) are recess
artcher [175]

Answer:

1/2 wWBb , White wool and brown eyes.

1/2 wWbb , White wool and blue eyes.

Explanation:

White wool (W) is dominant over black wool (w).

Brown eyes (B) is dominant over blue eyes (b).

A sheep with black wool (ww) and brown eyes (Bb) is crossed with a sheep with white wool (WW) and blue eyes (bb).

<h3>wwBb x WWbb</h3>

If there is independent assortment between genes, the genotypes of the first parent's gametes will be wB and wb. The gametes of the second parent can only be Wb.

<u>The resulting offspring will be:</u>

  • 1/2 wWBb , White wool and brown eyes.
  • 1/2 wWbb , White wool and blue eyes.

6 0
3 years ago
The innermost layer of the meninges is the
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The innermost layer of the meninges is the pia mater.

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All cells are contained within a membrane called the:
soldier1979 [14.2K]

Answer:

D. phospholipid bilayer

Explanation:

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6 0
3 years ago
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Which of the four types of organic compunds serve as an energy source<br> WILL GIVE BRAINLIEST
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Answer:

Carbohydrates

Explanation:

5 0
2 years ago
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