Anonymous asked in Science & MathematicsBiology · 1 decade ago

Mitosis and Meosis?

1. What is the term for the point of attachment between two chromatids?

2. Do all of the cells in your body divide at the same rate? Explain.

3. In what order do the phases of the cell cycle occur?

4. Interphase occurs twice in meiosis. TRUE or FALSE.

5. Do homologous chromosomes have the same number of genes? Do they have identical genes? Explain.

2 Answers

  • Anonymous
    1 decade ago
    Favorite Answer

    1. Centromere

    2. No they do not. Each type of cell divides at a different rate depending on its required function. Cells in the skin and intestine divide very rapidly as they are exposed to hostile environment and many die and need to be replaced quickly. However brain cells hardly divide at all.

    3. Depends on whether its the mitotic or meiotic cycle you are referring to. Basically it occurs in the sequence for both: Interphase (longest phase of cell cycle), then nuclear division (either mitosis or meiosis depending on the type of cell cycle), then finally cytokinesis (the division of the cytoplasmic contents into its daughter cells).

    4. False

    5. They do have the same number of genes however they may not be identical.

    A pair of chromosomes is known as homologous chromosomes, each member of such a pair is called a homologue. They are similar in size, shape, centromere position and staining pattern. One homologue originates from the male parent, another from the female parent. They pair up during Prophase 1 of meiosis.

    Their genes are for the same characteristics at the corresponding loci thus they determine the same traits (e.g. blood group, hair color, eye color etc). But they may not be identical in what they code for (e.g. one homologue may code for brown hair, another for black hair).

  • 5 years ago

    19.If you cross those two plants they could have the following series of qualities: AABb,AAbb,AABB,AaBb,Aabb,aabb.If you have a dominant(A or B) and a recessive(a or b) ghene only the quality defined by the dominant one will peep.If we have two dominant ghenes they will both peep,and the recessive ghenes only peep when together. Ghenotype in proper sence is the assemblange of more attributes and in wider sence contains the whole organism with all it's attributes. Phenotype concerns only one attribute. 20.Mitosis: a)prophase b)metaphase c)telophase d)anaphase e)interphase -Meiosis contains meosis 1 and meosis 2.Meosis 1 contains prophase 1,metaphase 1 and so on. Hope this helps.

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