Answer:
evolution of life on Earth
Explanation:
Life began on Earth at least 3.5 to 4 billion years ago, and it has been evolving ever since. At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, Earth's biodiversity greatly increased.
4 cells will result. Each cell will have 20 Chromatids which is half a chromosome. once sexual reproduction takes place, these 20 chromatids will match with those from the other parent cell to form chromosomes
<span>Sensory and motor nerves make up the central nervous system.</span>
The number of phenotypes produced for a given trait depends on how many genes control the trait. Anyhow, The distribution of phenotypes for a typical polygenic trait can often be expressed as a bell-shaped curve.
Many traits are controlled by two or more genes and are, therefore, called polygenic traits<span>. Each gene of a polygenic trait often has two or more alleles. As a result, one polygenic trait can have many possible genotypes and phenotypes.</span>
So children<span> look like combinations of </span>their parents<span> because they are. Each </span>parent<span>gives half of </span>their<span> genetic material to </span>their children<span>. The combination makes a unique combination of </span>their parents<span> genes. The scientific study of how </span>traits<span> are passed from </span>parents<span> to </span>children<span> is called genetics.
sry for the long answer</span>
