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Genetics LAB > recitation 10 > Flashcards

recitation 10 Flashcards

1
Q

crossing over

A

recombination between homologous chromosomes during meiosis

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2
Q

recombination

A

distance between 2 loci determines how likely they are to undergo recombination

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3
Q

genetic mapping

A

determine order + estimate distance between linked genes

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4
Q

map distance

A

of recombinant offspring / total # of offspring

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5
Q

how to create a linkage map

A

test cross = how often we get recombinant offspring we can determine distance between 2 loci

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6
Q

test cross

A

F1 heterozygous (AaBb) x Homozygous recessive individual (aabb)

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7
Q

recombination frequency

A

(recombinants / total offspring) x 100%

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8
Q

Chi Sqaure Analysis

A

null hypothesis - no relationship

alternative hypothesis - there is a relationship

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9
Q

Chromosome structure changes

A

deletion, duplication, inversion, translocation

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10
Q

deletion

A

region of chromosome lost

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11
Q

duplication

A

portion of chromosome is repeated

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12
Q

Inversion

A

rearrange gene sequence to the opposite orientation

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13
Q

translocation

A

segment of a chromosome becomes attached to a non-homologus chromosomes - alter the location of a segment of a chromosome

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14
Q

Changes in chromosome #

A

Aneuploidy

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15
Q

Aneuploidy

A

variation in # of single chromosome within a set

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16
Q

trisomy

A

2n+1

17
Q

monosomy

A

2n-1

18
Q

Euploidy

A

variation in the # of complete sets of chromosomes derives from chromosome problems
Autopolyploidy & Allopolyploidy

19
Q

non-disjunction

A

failure of chromosomes to separate properly

20
Q

meiotic

A

occurs during anaphase 1 o 2

21
Q

occurs during anaphase

A

miotic

22
Q

polyploidy

A

varieties often larger and more robust odd numbered become sterile seedless flowers and fruits

Genetics LAB (4 decks)

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