1. Fill in this table: Mitosis Meiosis Type of reproduction (sexual or asexual) Fof cell'nuclear divisions Synapse/ crossing over? (yes or no) Centromeres dissolve during anaphase? Meiosis I? Meiosis II7 Chromosome # at beginning? Chromosome # at end of process? Meiosis I? Meiosis II? F of daughter nuclei? Daughter cells the same as parent cell? Daughter cells genetically identical to cach other?

1. Fill in this table: Mitosis Meiosis Type of reproduction (sexual or asexual) Fof cell'nuclear divisions Synapse/ crossing over? (yes or no) Centromeres dissolve during anaphase? Meiosis I? Meiosis II7 Chromosome # at beginning? Chromosome # at end of process? Meiosis I? Meiosis II? F of daughter nuclei? Daughter cells the same as parent cell? Daughter cells genetically identical to cach other?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter2: Cells And Cell Division

Section: Chapter Questions

Problem 24QP: A cell (2n = 4) has undergone cell division. Daughter cells have the following chromosome content....

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Concept explainers

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:

Question

1. Fill in this table:
Mitosis Meiosis
Type of reproduction
(sexual or asexual)
# of cell/nuclear divisions
Synapse/ crossing over?
(yes or no)
Centromeres dissolve
Meiosis 1?
during anaphase?
Meiosis II?
Chromosome # at
beginning?
Chromosome # at end of
process?
Meiosis I?
Meiosis II?
# of daughter nuclei?
Daughter cells the same as
parent cell?
Daughter cells genetically
identical to cach other?
2.
a. A cell has n=2. How many total chromosomes are in a diploid cell?
b. Draw this cell during metaphase of mitosis:

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A cell has a diploid number of 6 (2n = 6). a. Draw the cell in metaphase of meiosis I. b. Draw the cell in metaphase of mitosis. c. How many chromosomes are present in a daughter cell after meiosis I? d. How many chromatids are present in a daughter cell after meiosis II? e. How many chromosomes are present in a daughter cell after mitosis? f. How many pairs of homologous chromosomes are visible in the cell in metaphase of meiosis I?
Figure 13.6 Which of the following statements about nondisjunction is true? Nondisjunction only results in gametes with n+1 or n-1 chromosomes. Nondisjunction occurring during meiosis II results in 50 percent normal gametes. Nondisjunction during meiosis I results in 50 percent normal gametes. Nondisjunction always results in four different kinds of gametes.
At which stage of meiosis are sister chromatids separated from each other? a. prophase I b. prophase ll c. anaphase I d. anaphase ll
Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis? haploid with one copy of each gene haploid with two copies of each gene diploid with two copies of each gene diploid with four copies of each gene
Tetraploidy may result from: a. lack of cytokinesis in meiosis II b. nondisjunction in meiosis I c. lack of cytokinesis in mitosis d. nondisjunction in mitosis in the early embryo e. none of these
The chromosome constitution number of this individual is 2=6. This drawing represents: a. mitotic metaphase. b. meiotic metaphase I. c. meiotic metaphase II. d. a gamete. e. sixnonhomologous chromosomes.
At which stage of meiosis are sister chromatids separated from each other? prophase I prophase II anaphase I anaphase II
Metaphase in mitosis is similar to what stage in meiosis? a. prophase I b. prophase II c. metaphase I d. metaphase II e. crossing-over
Match each term with its description. ___interphase a. different forms of a gene ___metaphase I b. useful for varied offspring ___alleles c. none between meiosis I and meiosis II ___zygotes d. chromosome lineup ___gametes e. haploid ___males f. form at fertilization ___prophase I g. mash-up time
If a muscle cell of atypical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism? 8 16 32 64
Which of the following statements is not true in comparing mitosis and meiosis? a. Twice the number of cells are produced in meiosis as in mitosis. b. Meiosis is involved in the production of gametes, unlike mitosis. c. Crossing over occurs in meiosis I but not in meiosis II or mitosis. d. Meiosis and mitosis both produce cells that are genetically identical. e. In both mitosis and meiosis, the parental cell is diploid.
Figure 10.6 Which of the following is the correct order of events in mitosis? Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus reforms and the cell divides. Cohesin proteins break down and the sister chromatids separate. The kinetochore becomes attached to the mitotic spindle. Cohesin proteins break down and the sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the cohesin proteins. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. Cohesin proteins break down and the sister chromatids separate. The nucleus reforms and the cell divides.