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Genetics > Slideshow 7 > Flashcards

Slideshow 7 Flashcards

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Biology 101 flashcards
1
Q

dihybrid is expected to produce what

A

a 1:1:1:1 ratio of gametic types

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2
Q

dihybrid def

A

heterozygous at both genes

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3
Q

a gametic type def

A

the combination of alleles in a gamete

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4
Q

Parental type def

A

a gametic type produced by the f1 offspring of two parents, which posseses the same combination of alleles as the gametic type of one of the parents

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5
Q

recombinant type

A

a gametic type produced by the f1 offspring of two parents , which possess a new combination of alleles relative to the gametic types of the parents

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6
Q

recombination frequency

A

how many are recombinated

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7
Q

meiotic recombination types

A

independent assortment and crossing

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8
Q

independent assortmen expected r

A

=.05

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9
Q

crossing over expedcted r

A

<.05

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10
Q

Locus

A

a specific positon on a chromosome

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11
Q

linkage

A

says that more than one loci are linked

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12
Q

dihybrid cross. unlinked loci? ratio

A

9.3.3.1

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13
Q

dihybrid testcross. unlinked loci ratio?

A

1.1.1.1

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14
Q

linked loci

A

hard to predict

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15
Q

Chromosomal theory of inheritance

A

generes are carred on chrs
chrs. are assorted independently, not individual genes

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16
Q

not 1.1..1..1 meanssss

A

linkage

17
Q

how is recombinant a thing if genes are linked >

A

crossing over !

18
Q

less coomon as distance between a + b what

A

increases

19
Q

more common as distance btw a and b what

A

decreases

20
Q

r and distance ise

A

positively correlated

21
Q

linked genes close together

A

no recombinant types (to few)

22
Q

linked genes far apart.

A

50 percent recombinant types

23
Q

genetic linkage distance measured in

A

cM

24
Q

physical distance is measured in

A

base pairs (bp)

Genetics (15 decks)

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