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3 years ago

Which of the following best describes the result of meiosis II?

2 answers:

5 0

The answer is B. Because meiosis process produce genetically different, haploid cells. Also, meiosis basically happen to produce gametes. Gametes is haploid. So, the answer is B

Paraphin [41]3 years ago

4 0

Answer:

Explanation:

Meiosis is a type of cell division that results in four daughter cells with each having half the number of chromosomes as the parent cell. Because meiosis is the cell division employed in the production of gametes (reproductive cells), the reduction in chromosome number is very vital- without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes. Hence, the cell does this by undergoing two rounds of nuclear and cytoplasmic division; Meiosis I and Meiosis II. This is unlike mitosis that undergoes one round.

In Meiosis I, homologous chromosomes pair up and lie side by side to form a TETRAD or BIVALENT structure. After which the homologous pair become separated in anaphase I. After cytokinesis, two daughter cells with reduced chromosome number arises i.e. haploid, n

N.B: A normal diploid (2n) organism contains 46 chromosomes, hence after meiosis I, two haploid daughter cells with 23 chromosomes (n) each arises.

In Meiosis II, which is similar to mitotic division, the individual chromosomes (sister chromatids) in each cell are pulled apart and separated to each pole. After cytokinesis, a total of four daughter cells arise. Since Meiosis II is similar to mitosis, no reduction occurs again. Hence, the four daughter cells or gametes will be haploid (n) in chromosomal number.

The four daughter cells are genetically different because meiosis creates new combinations of genetic material in each of the four daughter cells. Specifically, these new combinations result from the exchange of DNA between paired chromosomes in Prophase of meiosis I. This genetic exchange, called CROSSING-OVER or RECOMBINATION, means that the daughter cells produced through meiosis exhibit an amazing range of genetic variation unlike mitosis that produces genetically identical cells.

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Mutation and Recombination

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7. Which of the following classes of biological molecules include enzymes?

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3 years ago

Body Type: DNA code- AGTGCCTTC RNA code- ___________ Amino Acid sequence (aka protein)- ___________________ Body Type?- ________

olga2289 [7]

Answer:

The correct answer would be:

mRNA sequence - UCACGGAAG,
amino acid sequence - Ser-Arg-Lys, and
body type - dwarf

By central dogma, we know that nucleotide sequence of deoxyribonuceic acid (DNA) form the amino acid sequence of a polypeptide chain.

Nucleotide sequence of DNA is first decoded in the form of nucleotide sequence of mRNA (messenger ribonucleic acid) under the process of transcription. The sequence of RNA is complementary to the nucleotide sequence of template strand of DNA. In addition, uracil is present in RNA in place of thymine.

tRNA (transfer RNA) then deciphers the codon sequence of mRNA into amino acid sequence of polypeptide sequence by the process of translation.

Now, given DNA sequence is AGTGCCTTC.

so, the mRNA sequence would be UCACGGAAG.

Codon sequence is UCA CGG AAG.

So, the amino acid sequence would be Ser-Arg-Lys.

Hence, the trait of showman performer would be dwarfism.

Codon sequence chart is attached for reference.

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8. Which of these is the direct result of an error in the transcription of a DNA

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Answer: The answer is D. Hope this helps :)

Explanation:

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3 years ago