Ans.
Meiosis involves a type of cell division in sexually reproducing organisms that results in formation of four daughter cells from a single parent cell, having half of the genetic material as in parent cell. Meiosis is divided into meiosis I and meiosis II.
In gamete forming cells of humans are diploid cells and have 23 pairs of chromosomes (or 46 chromosomes). Each gamete forming mother cell undergoes meiotic division to form haploid daughter cells or gametes, each with 23 chromosomes.
Thus, the correct answer is 'twenty-three' as there are 23 chromosomes present in human sex cells at the end of meiosis II.
Answer: G protein acts as the link between first and second messengers
Explanation:
Genetic variation in a population allows for phenotypic variation, meaning that different traits exist in the same population. When the environment changes, the members of the population are tested by natural selection with regards to how well adapted their specific traits are to the new environment. If the traits they have do not suit their environment, this results in reduced survival and fitness, leading to less of that trait in the population. However, if the traits they have are adapted to the environment, they become naturally selected for with better survivability and fitness (leading to a higher frequency of that trait in the population). Thus, evolution has occurred.
<span>The pro is that it gives a lot of information. The con is that it is a bit expensive to do a whole genome sequence. However, the price is coming down all the time.
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Answer:
Pacific Northwest
Explanation:
In the United States, the Pacific Northwest is the region that receives the least thunderstorm in a year. This is because of the location of the region. The region consists of states like Washington, California, Alaska, Hawaii, and Oregon. This region has few thunderstorms due to the nature of the region. The coldness of the pacific ocean means that there is more colder air on the earth. This suppressed the hot air. Thus, conventional rainfall; with thunder is less common. The other factor is the dryness of the region. The dry region has a lower humidity. This lesson the chance of charges air between the two fronts.
