chapter 10 Flashcards

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1
Q

DNA is copied

A

in the S phase of interphase

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2
Q

A gene

A

is a sequence of nitrogeneous bases in DNA

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3
Q

Sister Chromatids

A

contain identical DNA information

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4
Q

In mitosis, chromosomes line up at the cell mid plane during

A

Metaphase

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5
Q

Cell plate formation occurs

A

during cytokinesis

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6
Q

Cell division in bacteria is called

A

binary fission

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7
Q

In mitosis the nuclear membrane begins to breakdown during

A

Prophase

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8
Q

Meiosis produces

A

haploid cells

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9
Q

each homolog of a pair of homologous chromosomes

A

carries the same genes but potentially different alleles than its pair

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10
Q

Crossing over occurs during

A

prophase 1

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11
Q

Homologs separate during

A

anaphase 1

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12
Q

Genetic variation during sexual reproduction occurs during

A

crossover and independent assortment

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13
Q

Prokaryotic chromosomes are

A

circular

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14
Q

During Mitosis the # of chromosomes

A

stay the same from beginning to end.

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15
Q

During Meiosis the # of chromosomes

A

cut in half from beginning to end

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16
Q

2 identical sister chromatids are

A

replicated chromosomes

17
Q

Chromosomes

A

the major carriers of genetic information in eukaryotes and lie within the cell nucleus

18
Q

chromosomes are made up of

A

chromatin

19
Q

chromatin

A

a material consisting of DNA and associated proteins.

20
Q

genes

A

DNA is organized into informational units called:

21
Q

Chromosome packaging is facilitated by certain proteins known as:

A

histones

22
Q

histones associate with DNA to form structures called:

A

nucleosomes

23
Q

These function like tiny spools to prevent DNA from becoming tangled

A

Nucleosomes

24
Q

Scaffolding proteins

A

non-histone proteins that help maintain chromosome structure

25
Q

a group of proteins required for chromosome compaction

A

condensin

26
Q

The 1st and longest phase of cell cycle

A

interphase

27
Q

g phase of interphase

A

growth and normal metabolism, no DNA synthesis occurs.

28
Q

S phase of interphase

A

DNA replicates

29
Q

G2 phase of interphase

A

increased protein synthesis occurs

30
Q

M Phase

A

mitosis and cytokinesis

31
Q

Mitosis

A

the nuclear division that produces 2 nuclei containing chromosomes identical to the parental nucleus

32
Q

Cytokinesis

A

division of cell cytoplasm to form 2 cells