Chapter 13 - Meiosis & Sexual Life Cycles Flashcards

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1
Q

Define Gene

A

A specific sequence of DNA.

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2
Q

Define genome

A

Genetic material of an organism

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3
Q

Define life cycle

A

a series of changes in ones life. i.e. reproduction.

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4
Q

What are somatic cells?

A

Any cell in a multi-cellular organism except for sperm or egg.

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5
Q

What are sex cells?

A

Gametes

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6
Q

What is a Karyotype?

A

A display of chromosome pairs of a cell arranged by size and shape.

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7
Q

What are homologous chromosomes?

A

A pair of identical chromosomes. One homologous chromosome is inherited from the mother and the other from the father.

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8
Q

What are autosomes?

A

A chromosome not directly involved in determining sex.

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9
Q

What are gametes?

A

A reproductive cell such as egg or sperm

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10
Q

What are haploid cells?

A

A cell that contains only one set of chromosomes.

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11
Q

What is fertilization?

A

The union of haploid gametes to produce a diploid zygote.

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12
Q

What is a zygote?

A

A fertilized egg

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13
Q

What does diploid mean?

A

2n

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14
Q

What does haploid mean?

A

n

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15
Q

What is a tetrad?

A

Chromosomes that have a pair.

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16
Q

What is the Chiasma?

A

physical crossing over.

17
Q

What is the synapsis?

A

The pairing and physical connection of homologous chromosomes during prophase I of meiosis.

18
Q

What is chromatin?

A

The complex of DNA that makes up a chromosome.

19
Q

What are chromatids?

A

one of two homologous chromosome strands.

20
Q

What is crossing over?

A

Exchange of genetic material between nonsister chromatids. This occurs during prophase I of meiosis.

21
Q

What are recombinant chromosomes?

A

A chromosome that is created when crossing over combines DNA from two parents into a single chromosome.