Answer:
QUESTION:
Why do the chromosomes line up in the middle of the cell?
ANSWER:
Chromosomes line up at the metaphase plate, under tension from the mitotic spindle. The two sister chromatids of each chromosome are captured by microtubules from opposite spindle poles. In metaphase, the spindle has captured all the chromosomes and lined them up at the middle of the cell, ready to divide.
Explanation:
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Answer:
Female gametes are called eggs. In human males, for example, the process that produces mature sperm cells is called spermatogenesis. ... In human females, the process that produces mature eggs is called oogenesis. Just one egg is produced from the four haploid cells that result from meiosis
Explanation:
Answer:
Explanation:
Lethal mutations are mutations that are deleterious, its presence in an individual brings about the death of such individual.
Insertion or deletion this a mutation caused by the addition or deletion of a nitrogenous base leading to a shift in the reading frame and a formation of new bases sequence.
Indel mutations can be beneficial at times resulting into variations that is important in an individual. This variation can be explored and use for research.
Answer:
<em>The correct option is 15 seconds.</em>
Explanation:
At the time of exercise, our muscles contract rapidly. The contraction of the muscles is a phenomenon which occurs from the energy source ATP.
There are four sources of obtaining ATP at the time of muscle contraction. One of this source is phosphocreatine.
The phosphocreatine can create ATP for 15 seconds after the muscles start to contract. Phosphocreatine has the ability to donate a phosphate group to ADP to produce ATP.
<span>Insertion (illustration)</span>
An insertion changes the number of DNA bases in a gene by adding a piece of DNA. As a result, the protein made by the gene may not function properly.
