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Iteru [2.4K]
3 years ago
9

Tay-Sachs disease is a lethal, autosomal recessive genetic disorder. If both parents are heterozygous carriers of the disease, w

hat are the chances of them having a child who is also a heterozygous carrier for Tay-Sachs?
a. 100%b. 75%c. 50%d. 25%

Biology
1 answer:
rjkz [21]3 years ago
4 0

Answer:

50%

Explanation:

Let's assume that the allele "T" gives the normal phenotype while the recessive allele "t" imparts the disease and is lethal in homozygous condition. The genotype of each of the two carrier parents would be "Tt". A cross between Tt and Tt would give the progeny in the following genotype ratio=

Tt x Tt= 1/4 TT: 1/2 Tt: 1/4 tt

Therefore, 1/2 or 50% progeny would be the carrier for the Tay-Sachs disease.

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how is the inheritance pattern shown by this flower different from other inheritance patterns you have seen or studied
ch4aika [34]

.Answer: if the image that is supposed to be attached to this question is a picture of a flower showing both red and white spots as it colors, then the inheritance pattern shown is different from the other inheritance pattern because the normal inheritance pattern would only show one color. Normally, a flower would have a uniform color. In this case, only white or only red. The flower shows what we call, co-dominance. Red and white colors are both traits of the flower and the colors both manifest. In other traits, only the dominant trait is exhibited.

Explanation: found it on brainly :)

6 0
3 years ago
Which phase of mitosis has the
Arte-miy333 [17]

Answer:

B. Metaphase

Explanation:

The reason why it is Metaphase is because each of the 46 chromosomes line up along the center of the cell at the metaphase plate.

3 0
2 years ago
Which of the following is NOT a mechanism for the development of autoimmune disorders?
aleksandr82 [10.1K]

Answer:

d. a second exposure to an allergen

Explanation:

An autoimmune disease is a condition that occurs when the immune system attacks and destroys healthy body tissues by mistake.

Normally, white blood cells (leukocytes), produced in the bone marrow and found in the blood, help to protect the body against invasive and harmful substances known as antigens. Examples are viruses, bacteria, toxins, cancer cells, etc. Leukocytes are a fundamental part of the immune system, whose main function is to produce antibodies that keep the human body protected from the action of these antigens by destroying them.

In the case of autoimmune diseases, the immune system cannot distinguish antigens from healthy body tissues and ends up attacking and destroying normal body cells.

The causes of autoimmune diseases are not yet known, although there are many mechanisms that trigger these diseases. However, we can confirm that these diseases are not caused by a second exposure to an allergen, which is a substance that can induce a hypersensitivity reaction in some people.

3 0
3 years ago
In a pig 1 hour after eating corn the primary source of blood glucose will be
Step2247 [10]
The correct answer should be, <span>Absorbed glucose.</span>
7 0
3 years ago
The controlled release of cellular material stored in membrane-bound vesicles to the outside of the cell is an example of: Group
puteri [66]

Answer:

Exocytosis

Explanation:

Exocytosis refers to a cellular process in which the large molecules are transported out of the cell by the membrane-bound vesicles.

The process of exocytosis is an active process and is therefore driven by the ATP. The process of exocytosis is possible because of the fusion of the secretory vesicle with the plasma membrane which leads to the release of the material outside of the cell.

Thus, exocytosis is the correct answer.  

4 0
3 years ago
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