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laila [671]
3 years ago
15

Sickle cell anemia and albinism are both recessive traits in humans. The genes for these traits are located on different chromos

omes. Imagine that a couple, already pregnant with twins, has just learned that they are both heterozygous for both of these traits. As the couple's genetic counselor, the couple asks you the following questions about how their carrier status will affect their offspring.
If the couple has fraternal twins, what is the probability that both children will be unaffected by both conditions?
Biology
1 answer:
Liula [17]3 years ago
6 0

Answer:

Given that, both parents are heterozygous. Now, the chances for one child to inherit one defective gene from each parent = ½*1/2 =¼.

Similarly, the probability of being affected by albinism =Probability of inheriting one defective gene from each parent = ½*½ = ¼

The probability of not being affected = 1- the probability of being affected = 1-1/4 = ¾.

Now, the chances of not being affected by both albinism and sickle cell anemia = ¾*3/4 = 9/16.

The probability of neither twins be affected = 9/16*9/16 =81/256.

Explanation:

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Match these nutrients with their functions. (iodine, Vitamin D, Vitamin A, phosphorus, Vitamin E, Vitamin K, water, Vitamin B, c
Dafna1 [17]

Answer;(iodine, Vitamin D, Vitamin A, phosphorus, Vitamin E, Vitamin K, water, Vitamin B, calcium, Vitamin C, iron)

1. helps cells function normally ----vitamin E

2. needed by all cells, especially by red blood cells, to help carry oxygen ---iron

3. helps in forming blood cells, helps resist infection, helps prevent fatigue and aids in healing, prevents scurvy ----vitamin C

4. helps keep skin healthy, protects against night blindness, promotes healthy eyes -----vitamin A

5. used by the body to form bones and teeth, helps blood clot, helps muscles and nerves work normally ----calcium

6. keeps nervous system healthy, keeps appetite and digestion healthy, helps body chemistry to function normally ----vitamin B

7. helps blood to clot ----vitamin K

8. necessary to carry nutrients to cells and carry away waste products ----water

9. helps body use calcium and phosphorus to form strong bones ----vitamin D

10. similar to calcium; needed by all cells in small amounts to help them use other nutrients for energy ---phosphorus

11. helps control rate of metabolism of food ----Iodine

Explanation:

6 0
3 years ago
What types of features would be visible if the oceans were drained?
lesya [120]
Draining the oceans would show features such as mid-ocean ridges. These features would look like an extensive mountain range running down the spine of the ocean floor. This region marks the area where two oceanic tectonic plates are being pushed apart. Closer to land or the continents would be a gentle shelf that gradually deepens as one moves away from the coastline. This relatively gentle plain would then make a steep drop off down to an extensive plain stretching towards ocean ridges. The ocean floor also supports lone mountain structures, canyons and chasms. 
6 0
3 years ago
A gene is a sequence of blank in a dna molecule
tangare [24]

Answer:

The correct answer would be nucleotide.

Explanation:

4 0
3 years ago
Which of the following statements is consistent with the principle of competitive exclusion? Which of the following statements i
Elodia [21]

Answer:

Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species.

5 0
3 years ago
Which of these organisms is not an omnivore?
AnnZ [28]

Answer: c Blue whale

Explanation:omnivore is

an animal or person that eats food of both plant and animal origin.

Blue Whale is a carnivorous animal that despite the fact that it doesn't have proper teeth, survives on a diet that is mainly comprised of krill and small crustaceans, along with the occasional small fish.

5 0
3 years ago
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