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RideAnS [48]
3 years ago
8

What must happen before meiosis can begin

Biology
1 answer:
RUDIKE [14]3 years ago
4 0

Answer:

The correct answer is option C.

Explanation:

Before meiosis, DNA that is stacked into chromosomes must replicate. Before replication, the sex cell has two copies of each chromosome, one from mother, and one from father.

DNA replication takes place in the same manner as it does during mitosis. After the chromosome replication, the homologs are double in number, and each chromosome now has a homologous pair of chromosomes.

Thus, the correct answer is option C.

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arsen [322]

The first person generally credited with fulfilling the functions of the modern director was George, Duke of Saxe- Meiningen. Meiningen was a wealthy aristocrat and head of a small German principality. In 1826, George, Duke of Saxe- Meiningen and his morganatic wife started an experimental acting group which was one of the first companies in which the importance of the director was stressed.






7 0
3 years ago
What is air pressure? At what elevation is air<br> pressure the highest? Why?
Step2247 [10]

Answer:

With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude. On top of Mount Everest, which is the tallest mountain on Earth, air pressure is only about one-third of the pressure at sea level.

5 0
3 years ago
In a particular breed of cattle, the trait of not having horns (Pp) is dominant over having horns (pp). The Punnett square below
muminat

Answer:

C.50%

Explanation:

3 0
3 years ago
Fill in the following blank answers :
Marat540 [252]
A: white oak
b: cottonwood
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e:black willow
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4 0
2 years ago
How many dna molecules are present in your diploid cells
Tcecarenko [31]

Answer:

92 molecules

Explanation:

DNA or Deoxyribosenucleic acid is polynucleotide made up of several nucleotides containing the genetic information of an organism. In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA, tightly coiled many times around proteins called histones to support its stucture.

Human cells, like myself, contains 23 pairs of chromosomes (46 chromosomes in total). Each pair coming from each parent. Each chromosome is formed by two strands of DNA held together by hydrogen bonds forming the DNA double-helical structure. These two DNA strands form a base pair, which is a unit of two nucleotide bases bound to each other by hydrogen bonds. According to the complementary base pairing rule, Adenine (A) pairs with Thymine (T) while Guanine pairs with Cytosine (C).

Since there are 46 chromosomes in a diploid human cell and each chromosome consists of 2 DNA strands, then, there are 46 × 2 = 92 strands/molecules of DNA in each human diploid cell.

7 0
3 years ago
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