Explanation:
The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life. These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells. The third part, which asserts that cells come from preexisting cells that have multiplied, was described by Rudolf Virchow in 1858, when he stated omnis cellula e cellula (all cells come from cells).
Since the formation of classical cell theory, technology has improved, allowing for more detailed observations that have led to new discoveries about cells. These findings led to the formation of the modern cell theory, which has three main additions: first, that DNA is passed between cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically; and finally, that energy flow occurs within cells.
Both the parents are heterozygous.
https://www.bbc.co.uk/bitesize/guides/z8nxtyc/revision/4
Answer: The correct answer is It produces gametes that are needed for sexual reproduction.
Explanation-
Meiosis is a type of cell division, which is a characteristic feature of sexually reproducing organisms. It produces reproductive cells called gametes, which possess half number of chromosomes as compared to their parental cells ( which are diploid). Gametes from each parent fuse to form a diploid zygote that develops into an individual.
Thus, it summarizes the importance of meiosis to reproduction.
The different combination of alleles for two genes must be due to "Crossing Over" [ Process occurs after fertilization, inter-changing of characters ]
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Answer: Pairs of homologous chromosomes exchange segments. brainliest
Explanation:
