Answer:
Egg and sperm cells have to have half the number of chromosomes as in body cells so when they combine to form a zygote, the zygote is diploid and has the correct number of chromosomes. This explanation describes why meiosis produces haploid cells.
Explanation:
Meiosis is a type of cell division in which four haploid cells are produced from a diploid parent cell having two copies of each chromosome, where the number of chromosomes in the parent cell is reduced to half by undergoing DNA replication and nuclear division. Diploid cell contains two copies of each chromosome, one inherited from mother and the other from father while haploid cell contains only one copy of each chromosome. Examples of diploid cells (somatic cells) are skin, blood, muscle cells etc. Eggs or ovum (female gametes) and sperm (male gametes) are haploid reproductive cells. If the total number of chromosomes in a diploid cell is represented as '2n', then the number of chromosomes in a haploid cell is 'n'. During the fertilization process in an organism, the correct number of chromosomes is restored when the haploid male and female gamete combined to form a single diploid zygote, which is the first developmental stage of an organism.
<span>Technology is one reason why the shire horse is in decline. With the main job that they did being farmwork, and many of these tasks being taken over by mechanized means, the number of breeders of these horses has declined and the number of horses therefore available has dipped, as well.</span>
An earthquake hits a small island. All but a few individuals of a lizard species are eliminated in this catastrophe, and an allele is lost from the population. This is an instance of the bottleneck effect.
Natural events like an earthquake catastrophe which eliminates, by chance, a large number of individuals of a population, can amplify the phenomenon of genetic drift. It is termed as the bottleneck effect. It leads to the elimination of a large part of the genome abruptly.
Immediately, the survivors' genetic composition becomes the whole population's genetic composition, which might be very distinct from the population that existed before the catastrophe.
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The higher the frequency of a sound wave (shorter distance between waves), the higher the pitch of the sound. The lower the frequency (longer distance between waves), the lower the pitch of the sound.
The cerebrum is the region of your brain where thought, vision, hearing, touch, and motion are processes. It's the largest part of the brain and contains the right and left hemispheres. The answer is cerebrum.
