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zzz [600]
3 years ago
9

True or False? Meiosis produces four nonidentical cells, each containing neither homologous chromosomes nor sister chromatids.

Biology
2 answers:
Tom [10]3 years ago
7 0

Answer:

The given statement is true.

Meiosis is a type of cell division which results in the production of four daughter cells, each containing exactly half the chromosome present in the parent cell.

Meiosis is divided into two steps:

Meiosis I: It is the reduction division in which homologous chromosomes are separated and distributed equally into two daughter cells.

Meiosis II: It is the second division in which sister chromatids are separated from each other and divided equally into the daughter cells.

Thus, the daughter cells neither contain homologous chromosomes nor the sister chromatids.

Arte-miy333 [17]3 years ago
3 0
....the answer is, True 
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If one strand of DNA double helix has the following nucleotide sequence ATCGGTCAAGCTAGG what would the dna complementary stand r
joja [24]

Answer:

TAGCCAGTTCGATCC

Explanation:

In DNA, there are 4 different nucleotide bases. Adenine (A), Thymine (T), Cytosine (C) and Guanine (G).

A (adenine) always pairs with T(thymine) and C(cytosine) always pairs with G (guanine).

If we have the strand:

ATCGGTCAAGCTAGG  

We have to pair A with T, and C with G. Therefore, the complementary strand of DNA will be:

TAGCCAGTTCGATCC

4 0
3 years ago
The pattern of transcription for a pair of identical twins (Tweedledee and Tweedledum) is very similar at the age of 10. However
aivan3 [116]

Answer:

Explanation:

My best bet is DNA methylation at the site of Tweedledum's leptin gene or Histone Acetylation at the site of Tweedledee's gene.

B/c DNA methylation is a process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the sequence. When located in a gene promoter, DNA methylation typically acts to repress gene transcription. So this is probably repressing Tweedledum's leptin gene trancription which is not happening in Tweedledee.

Additionally, Histone Acetylation at site of Tweedledee's gene increases her trancription b/c Histone acetylation causes DNA to be more accessible and leads to more transcription factors being able to reach the DNA. Thus, acetylation of histones is known to increase the expression of genes through transcription activation.

7 0
3 years ago
What are the two organelles are involved in cellular energetics ? Which of them are found in plants in animals?
Elodia [21]
Chloroplasts  - found only in plants and algae. they convert solar radiation energy to chemical energy usable for the cell's metabolism.
mitochondria - found in both plants and animals, they produce energy (in the form of ATP - chemical compound) by decomposing sugars and fats. they use up oxygen to do it.
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3 years ago
Please help me with this!
zepelin [54]
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2 years ago
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