Chapter 4 lecture Flashcards

1
Q

Who put gene on chromosomes

A

Thomas Morgan

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2
Q

What causes embryonic gonads to become male

A

SRY teste determination factor

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3
Q

how is a meta female fly created

A

3 X /2 Autosomal

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4
Q

how is a female fly made

A

2 X/ 2 autosomal

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5
Q

intersex fly created

A

2 x/ 3 autosomal

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6
Q

male fly

A

1 x/ 2 autosomal

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7
Q

Metamale fly

A

1 X/ 3 autosomal

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8
Q

nondisjunctio

A

no separation of chromosomes

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9
Q

What causes Down syndrome

A

21 chromosome nondisjuction

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10
Q

Turners sysndome is caused how

A

1 x chromosome

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11
Q

how is kleinfield syndrome caused

A

XXY

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12
Q

What is a Barr body

A

inactive X

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13
Q

How do male flys cope with 1 X

A

X works 2X harder

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14
Q

What is det^+det^+

A

Homozygous dominate and Wild Type

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15
Q

What is det^+det

A

Heterozygous

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16
Q

what is detdet

A

homozygous recessive and double mutant

17
Q

What is A+A+

A

homozygous dominant and double mutant

18
Q

A+a

A

heterozygous

19
Q

What is AA

A

Wild type homozygous recessive

20
Q

If red eye female mates with white eye male what is the F1 and F2 considering Eye color is on x chromosome

A

F1 All males and females red eyes
F2 All females red and 1/2 red eye male/ and 1/2 white eye male

21
Q

If white eye female mates with red eye male what is the F1 and F2 considering Eye color is on x chromosome

A

F1 all red eye female and all white eye male
F2 1/2 red and 1/2 white eye female and 1/2 red and 1/2 white eye male

22
Q

What are 2 examples of X-linked traits

A

hemophila and colorblindness

23
Q

What is a sex linked trait

A

any gene found on X

24
Q

how do sex chromosome know they are homologus

A

pseudoautosomal points

25
sex limited traits and example
expressed in 1 sex milk production
26
sex influnced traits and examples
more frequent in 1 sex than other baldness
27
What does it mean in corn P is white kernel and white kernel F1 is Purple kernels F2 9 purple kernels and 7 white kernels
complementary gene interaction
28
What does it mean in mice P is black and albino F1 is agouti F2 9 agouti 3 black 4 albino
epistasis need one gene to have color other wise one gene will be masked even if its dominant
29
how does DNA becomes phenotype
DNA ---> RNA ---> Protein ---> enzyme
30
what is the recessive gene
inactive enzyme
31
Who found 1 gene 1 enzyme hypothesis
Beadle and tatum
32
1 gene 1 enzyme hypothesis
1 gene codes for 1 enzyme but may also code for structural protein
33
explain a biochemical pathway
X---> O1 ---> O2 ---> O3 ---> pigment . G1 G2 G3 G4 . most dangerous mutant least dangerous mutant
34
Complementation
2 different genes will complement each other and 2 mutation occur in different genes
35
If 2 mutant white flowers produce a white flower what does that mean
the do no complement each other and the 2 mutations occur on same gene
36
If 2 mutant white flowers produce a red flower what does that mean
the do complement each other and the 2 mutations occur on different genes
37
using reciprocal crosses which help += complement - =does not complement. the complement groups are? . 1 2 3 4 5 1 - + - + 2 + - + 3 + + 4 +
group 1: 1,2,4 group 2: 3 group 3: 5