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irina1246 [14]
2 years ago
13

Why is prophase the longest phase of mitosis

Biology
2 answers:
blagie [28]2 years ago
5 0

Answer:

During prophase, which occurs after G2 interphase, the cell prepares to divide by tightly condensing its chromosomes and initiates mitotic spindle formation. The chromatin fibers condense into discrete chromosomes. The nucleolus also disappears during the early prophase. It's the most common/longest phase because of how long it takes to separate the chromatin, connect spindles, and prep for the rest. The cell essentially spends most of it doubling up on your DNA and prepping.

Explanation:

hope this helps have a good rest of your night :) ❤

Mamont248 [21]2 years ago
3 0

Answer:

During prophase, which occurs after G2 interphase, the cell prepares to divide by tightly condensing its chromosomes and initiates mitotic spindle formation. The chromatin fibers condenses into discrete chromosomes. The nucleolus also disappears during early prophase.

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A strain of a cereal grain can be either dark tan, medium-dark tan, medium tan, light tan, or cream colored. When a dark tan and
denis-greek [22]

Answer:

The correct answer is - 2 genes.

Explanation:

The number of genes involved in the coloration of the strain of cereal grain, could be either dark tan, medium-dark tan, medium tan, light tan, or cream-colored if all F1 are medium tan when crossed a dark tan crossed with cream-colored, can be calculated as follow:

suppose there are only two gene - TT dominant over tt and CC dominant over cc

then the cross would be - RRCC - rrcc

gametes - RC and rc

Cross F1: RrCc

Self cross in F2:

offspring by Punnet cross are:

RRCC  -->1/16  

RRCc,  RrCC .---> 4/16

RrCc, RRcc, rrCC--->6/16

rrCc, Rrcc--->4/16

rrcc ----> 1/16

thus, the correct answer is 2 genes

6 0
2 years ago
DNA<br>"Deoxyribonucleic<br>Acid"​
Zarrin [17]

Answer:

Details about DNA are given in the explanation section. Hope it will be helpful for you.

Explanation:

DNA, or deoxyribonucleic acid, is the hereditary element in humans and almost all other organisms. Nearly every cell in a person’s body has the same type of DNA. Most DNA is found in the cell nucleus (nuclear DNA), but a small quantity of DNA can also be found in the mitochondria (mitochondrial DNA or mtDNA).

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same type in all people.

DNA bases pair up with each other, A with T and C with G, to form units that are called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule.  A base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

A valuable feature of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases.

7 0
3 years ago
What is Anaerobic Respiration?
DochEvi [55]

Answer:

This is the respiration found in plants

Explanation:

5 0
2 years ago
What kind of charge does an object have if it has gained electrons
AnnZ [28]
I beleve that it is a negative charge.
8 0
3 years ago
Acquired immunity involves both a humoral immune response and a cell-mediated immune response. To review the definitions of thes
Katyanochek1 [597]

Answer:

Humoral response.

  • Plasma cells
  • Antibodies
  • B-cells

Cell mediated response.

  • Antigen presenting cells.
  • Helper T-cells and cytokines.
  • Cytotoxic T- cells

Both.

  • Memory cell

Explanation:

  • Immunity is typically divided into two categories- innate and adaptive.
  • Innate immunity is present since birth and consist of many factors that are relatively non-specific.
  • Adaptive immunity is also known as specific or acquired immunity, is capable of recognizing and selectively eliminating specific foreign antigen.
  • Adaptive immunity displays four characteristic features; Antigen specificity, Immunologic memory, Diversity, Self or non-self recognition.

  • There are two branches of acquired immunity, which involve different sets of participants and different purposes but one common aim: to eliminate the antigen.
  • One arm of adaptive immune response is mediated by B-Cells and circulating antibodies. This is referred to as humoral immunity.

  • The other arm of adaptive immune response is mediated by T-cells, which do not synthesize antibodies but release cytokines that affect other cells.
  • T-cell receptors do not form antibodies  but perform various effector functions when antigen presenting cells bring antigen into the secondary lymphoid organ.
  • T-cells are of two types ; T- helper cell and T-cytotoxic cells.
5 0
3 years ago
Read 2 more answers
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