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sveta [45]
3 years ago
14

transfer of materials into a cell against a concentration gradient, from low too high concentration, requires

Biology
1 answer:
Ronch [10]3 years ago
4 0
<span>Transfer of materials into a cell against a concentration gradient from low to high concentration requires active transport because you need energy for it to happen since its going againist the concentration gradient.

</span>
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When a player steps into his/her backswing, where should the weight of his/her body be placed? (1 point) le???? hip right hip ba
Maru [420]
<span>I am going to answer this as a golf player myself
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8 0
4 years ago
The condition that occurs when a zygote is missing in each cell is referred to as
scoray [572]
A monosomy occurs when a zygote has a single chromosome missing in each cell. This happens when<span> a portion of the chromosome has one copy while there are two copies in the rest of the other chromosomes.An example of an disorder is the Turner Syndrome which has only 1 X chromosome in female genome.</span>
5 0
3 years ago
Lesch-Nyhan syndrome is an X-linked, recessive condition caused by mutation of the HPRT1 gene responsible for purine metabolism.
Elanso [62]

Answer:

B. The father did not contribute a sex chromosome to his daughter due to nondisjunction of the sex chromosomes. The daughter is XO and her only X chromosome came from her mother, who was a carrier.

A.The mother's X chromosomes failed to separate during meiosis, and the daughter inherited two X chromosomes with the Lesch-Nyhan mutation. The father contributed no sex chromosomes.

Explanation:

As seen in the question above, a little girl was diagnosed with Lesch-Nyhan syndrome, which is an X-linked recessive condition caused by a mutation in the HPRT1 gene responsible for purine metabolism.

The little girl's parents do not have the syndrome, and no one in the little girl's paternal family presented this syndrome, however, we know that the maternal grandfather of the little girl's mother had the syndrome, which means that it was the mother's genetic material that contributed to the development of the syndrome in the little girl. This was because the little girl did not receive any X chromosomes from her father, but she inherited the two X chromosomes from her mother that coded for the Lesch-Nyhan mutation. This happened because the mother's X chromosome disjuction did not occur during meiosis I.

As shown above, the father did not contribute any sex chromosomes to his daughter, which means that the daughter is XO and her only X chromosome came from her mother, who was a carrier.

3 0
3 years ago
When gametes combine to form a zygote, the chromosomes number of the zygote is now referred to as
krek1111 [17]
The answer to your question is "Diploid. 
I hope this helps!
5 0
3 years ago
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Hello(: I need some help what is an <br><br> (Allele)
Licemer1 [7]

Answer:

An allele is one of two, or more, forms of a given gene variant. For example, the ABO blood grouping is controlled by the ABO gene, which has six common alleles. Nearly every living human's phenotype for the ABO gene is some combination of just these six alleles.

Explanation:

Plz give me brainliest worked hard.

4 0
3 years ago
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