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True [87]
3 years ago
11

Although the exact number of genes in human DNA is unknown, scientists estimate the number to be around 20,000 to 25,000.

Biology
2 answers:
trapecia [35]3 years ago
8 0

Answer:

The correct answer is option C, There are several variations, or alleles, of many genes

Explanation:

In a given set of population, and for a given set of genes there can be a single allele or there can be multiple sets of allele. But since any individual can carry only set of chromosome per cell,an individual only carries one or two alleles per gene. But if there are several genes then there would be several variations, or alleles, of many gene

Mazyrski [523]3 years ago
3 0
C, you have genes/allels that you got from your parents, but the combination of all your genes together is unique.
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5 0
2 years ago
Is anyone good at science please help for brainliest.
Dafna11 [192]

Answer:

eukarya

Explanation:

so long as that stands for eukaryotic

fungi is eukaryotic

other 2 are multicellular, and therefore eukaryotic

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6 0
3 years ago
For fertilization to occur in humans, only one sperm is needed to weaken the barrier that surrounds the egg.
photoshop1234 [79]

Answer:

False

Explanation:

Approximately 200 out of 200 million sperms ejaculated during intercourse reach the general vicinity of the egg.  They sperms must undergo capacitation during which dilute inhibitory factors fluids of the female reproductive tract weaken the membrane of the sperm head so that head of the sperm can be broken easily when it came in contact with the egg.

The first sperm to reach an egg isn’t the one to fertilize it because the egg is surrounded by a gelatinous membrane called the zona pellucida. Outside this layer, a layer of small granulosa cells also present.

Therefore, it requires numerous sperm to clear a path through these barriers before one of them can penetrate the egg and fertilize it.

8 0
3 years ago
Which of the following is single-stranded, found throughout the cell, and has the bases A, C, U, and G?
g100num [7]

Answer:

RNA

Explanation:

DNA has the bases of A,T,C, and G.

RNA has the bases of A,U,C, and G.

the T base in DNA is 'Changed' into the base U

4 0
3 years ago
All of the following are consequences of the reintroduction of grey wolves to Yellowstone EXCEPT
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The wolf population has substantially declined in Canada.

Explanation:

Pls mark brainliest

7 0
2 years ago
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