Answer:Recombination occurs through
crossing over and independent assortment. The correct option is B
Explanation:
-Genetic recombination is the process by which two different DNA are disintegrated and recombined to form new pairs of alleles. The process of recombination also involves the breakage and rejoining of parental chromosome. It occurs during meiosis ( that is formation of sperm and egg cells) and it gives them the correct number if chromosomes). Recombination occurs in meiosis through:
- CROSSING OVER: this is when paired chromosome press together and break, each may swap a portion of its genetic material.
- INDEPENDENT ASSORTMENT: which is the chromosome invented from either the father or mother can sort into any gamete and this produces a tremendous genetic variation. I hope this helps, thanks!
Sexual reproduction is associated with Meiosis. In this form of cell division, the number of chromosomes in the parent cells are reduced by half. The cells after division are called haploids. This mechanism is needed to make egg and sperm cells for sexual reproduction.
Las propiedades físicas incluyen : apariencia, textura , color, olor , punto de fusión, punto de ebullición , densidad, solubilidad, polaridad<span>
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Answer:
The chronological order of events ealiest to most recent (1-6) are given below:
Explanation:
1. Hans and Zacharias Janssen created the first microscope in the year 1590.
2. Robert Hooke was the first to use the word "cell." In the year 1665
3. Anton van Leeuwenhoek observed small organisms he called "animalcules." In the year 1674
4. Matthias Schleiden theorized that plants are made of cells in the year 1838
5. Theodor Schwann theorized that animals are made of cells in the year 1839
6. Rudolf Virchow theorized that cells come from other pre-existing cells in the year 1855
Habitat? When the trees start to burn the animals that live there have to either live or die so they lose their habitat.