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kati45 [8]
4 years ago
8

"during which phase of mitosis does the nuclear membrane dissolve completely and the chromatid pairs arrange themselves in a sin

gle file?"
Biology
1 answer:
Dahasolnce [82]4 years ago
5 0

<span>The answer is metaphase. It is marked by the arrangement of chromosomes at the center of the cell, half way between each of the mitoic spindle poles. Movement is intermediated by the kinetochore microtubles, which push and pull on the chromosomes to align them into what is called the metaphase plate. The chromosomes on the metaphase plate are held there firmly by pushing and pulling forces from the microtubules. Cells can stop in metaphase for days until the chromosomes are properly aligned and the cell go in anaphase.</span>

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Yoruba peoples are most closely related to which other population from the phylogenetic tree?
melisa1 [442]
Yoruba people are directly related to africans, they are mostly concentrated in Nigeria, Republic of Benin and Togo, africans countries. They are a very large population, reaching 40 million citizens, more than several countries in south america and europe, Yoruba people have existed since before IV century b.c, they even ha a powerful city named lle ife, cultural center of the population. After years, many Yoruba colonies were aslaved and taken to  North, and south America, influencing their religions and music style, countries like Venezuela, Cuba, Dominican Republic, Brazil, and Panama even created religions that use Yoruba words, such as ifa (destiny), ochosi (health), olofin (jesuschrist) and others.
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Does protista have a skull
attashe74 [19]
typically protista must not contain skull.
6 0
4 years ago
Why must you do mitosis
Lera25 [3.4K]

The main functions of mitosis are growth and repair. Some cells once fully formed do not undergo cell division, such as nerve cells and muscle cells. Since you can never re-grow or repair these types of cells once they are mature, you must take care of the ones you have.

Mark as brainliest, if you don't its ok:)

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3 0
4 years ago
Once the light organ is colonized, the squid no longer takes in Vibrio fischeri or other bacteria from the environment. Explain
balu736 [363]

Answer:

Due to suitable conditions.

Explanation:

Large population of bacteria can be maintained in the light organ to produce light by providing suitable conditions for growth and development in the organ. The luminescent genes are off when the organ has low cell density while on the other hand, when the density of cell is high in the light organ the luminescent genes automatically turned on and light up the organ. These Vibrio fischeri needs habitat and food for their growth and survival which is provided by the squid. If there is sufficient food for the squid, the population of Vibrio fischeri increases in the light organ.

8 0
4 years ago
assume that Q is the frequency of the recessive gene R expressing y color piece and that in a isolated area 68 plants with red a
Oksi-84 [34.3K]

Explanation:

<u>q= 0.566</u>

Homozygous individuals have two copies of the same allele for a gene. Homozygous dominant individuals carry two copies of the dominant allele, while homozygous recessive individuals carry two copies of the recessive allele.

Further Explanation:

DNA sets contain genes that may have different forms named alleles. DNA, which is the genotype, is transcribed into mRNA and later translated into amino acids which are connected together by rRNA to form proteins which constitute the phenotype of an organism. DNA sequence mutations form new allles, impacting the resulting mRNA, and thus the encoded protein. Within species, there may be adaptation, along with genetic drift, preferential breeding, and natural selection.

Within a population certain alleles are fixed over time. In Hardy-Weinberg-allelic frequencies, the equilibrium for a particular gene is not undergoing evolution, being stable for several generations. Mutations, during this time affect the corresponding mRNA, and thus the encoded protein. Evolution may occur within populations, along with genetic drift, selective mating, and natural selection.

Over time, certain alleles become fixed within a population. Equilibrium for a specific gene is not undergoing evolution in Hardy-Weinberg-allelic frequencies are stable for several generations. During this period, mutations do not occur within the population, this is shown as

p^{2} + 2pq +q^{2} = 1   ....(eqn i)

where...

p represents the dominant allele frequency

q represents the frequency of the recessive allele

q^2 = the genotypic frequency of the homozygous recessive

p^2= the genotypic frequency of the homozygous dominant

2pq= frequency of the heterozygous genotype

and simply p+q= 1                  ...(eqn ii)

The allelic freq. of r is denoted by q and the allelic frequency, R is denoted by p...

The total number of individuals= 32+ 68= 100

Thus q= √q^{2}= homozygous recessive individuals  (white flowers)

Since there are 32 white flowering plants , freq rr= 32÷ 100= 0.32

...thus q^{2}=0.32

   and q= √ q^{2}= √0.32= 0.566

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly  

8 0
4 years ago
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