BIOL 1005 Chapter Notes - Chapter 9: Telomere, Nuclear Membrane, Karyotype

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grayelephant515

3 Oct 2015

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Allele one of several alternative forms of a particular gene. Asexual reproduction reproduction that does not involve the fusion of haploid gametes. Autosome a chromosome that occurs in homologous pairs in both males and females and that does not bear the genes determining sex. Cell cycle the sequence of events in the life of a cell, from one cell division to the next. Cell division splitting of one cell into two; the process of cellular reproduction. Cell plate in plant cell division, a series of vesicles that fuse to form the new plasma membranes and cell wall separating the daughter cells. Centromere the region of a replicated chromosome at which the sister chromatids are held together until they separate during cell division. Chiasma a point at which a chromatid of one chromosome crosses with a chromatid of the homologous chromosome during prophase i of meiosis; the site of exchange of chromosomal material between chromosomes.

Related Questions

-Complete the following sentences: metaphase of mitosis, prophase II of meiosis, crossing over, anaphase I of meiosis, variable, random fertilization, identical, random orientation, metaphase I of meiosis, prophase I of meiosis, metaphase II of meiosis, reduction division

Two processes that occur during meiosis produce genetically ____________ cells.

In a process called ____________ , paired homologous chromosomes align randomly at the cell equator. This occurs during this stage of cell division: ____________ .

In a process called ____________ , genetic material is exchanged between homologous chromosomes. This occurs during this stage of cell division: ____________ .

-Complete the following paragraph to describe nondisjunction and the resulting effects on chromosome number.

words: euploidy, primary nondisjunction, nomal, nondisjunction, secondary nondisjunction, homologous chromosomes, abnormal, trisomy, monosomy, sister chromatids, aneuploid

1.During meiosis I, ____________ separate and move towards opposite ends of the poles.

2.During meiosis II, ____________ separate and move towards opposite ends of the poles.

3.During meiosis I, if both members of a homologous pair go into the same daughter cell, ____________ is said to occur and no normal gametes are produced.

4.During meiosis II, if the sister chromatids fail to separate and both daughter chromosomes go into the same gamete, ____________ is said to occur. Half the gametes are aneuploid while the other half are euploid.

5.If an egg that contains 24 chromosomes instead of 23 chromosomes is fertilized by a normal sperm, ____________ is said to have occurred.

6.If an egg that contains 22 chromosomes instead of 23 chromosomes is fertilized by a normal sperm, ____________ is said to have occurred.

Determine whether the following applies to mitosis, meiosis, orboth; also identify the specific stage of cell division thatapplies (e.g. mitosis prophase, meiosis anaphase II, etc)

1) chromosomes pairs line up across the center of the cell

2) sister chromatids seperate

3) spindle fibers separate homologous chromosomes

4) 4 haploid daughter cells are produced

5) a cell 1st undergoes DNA replication

6) chromosomes line up single file across the middle of thecell

7) sister chromatids separate from each other

8) 2 haploid daughter cells form

9) the nuclear membrane re forms

10) spindle fibers attach to pairs of homologous chromosomes

11) the nuclear membrane begins to dissolve

12) centrosomes duplicate

13) synapsis and crossing over occurs

14) 2 diploid daughter cells form

turquoiseporpoise808

Please place the following aspects of meiosis in the order in which they occur during M-phase. Assume that the meiotic cell being described has an interkinesis stage. Number 1-7.

Segregation of sister chromatids toward opposite poles of the cell followed by cytokinesis.

Alignment of duplicated chromosomes in the center of the cell

Condensation of chromosomes in a haploid cell

Condensation of chromosomes in a diploid cell

Alignment of pairs of chromosomes along their lengths and formation of chiasmata

Alignment of paired chromosomes in the center of the cell

Segregation of paired chromosomes toward opposite poles of the cell followed by cytokinesis

bronzerat101

BIOL 1005 Chapter Notes - Chapter 9: Telomere, Nuclear Membrane, Karyotype

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