Chapter 4 lecture

Question 1

Who put gene on chromosomes

Answer 1

Thomas Morgan

Question 2

What causes embryonic gonads to become male

Answer 2

SRY teste determination factor

Question 3

how is a meta female fly created

Answer 3

3 X /2 Autosomal

Question 4

how is a female fly made

Answer 4

2 X/ 2 autosomal

Question 5

intersex fly created

Answer 5

2 x/ 3 autosomal

Question 6

male fly

Answer 6

1 x/ 2 autosomal

Question 7

Metamale fly

Answer 7

1 X/ 3 autosomal

Question 8

nondisjunctio

Answer 8

no separation of chromosomes

Question 9

What causes Down syndrome

Answer 9

21 chromosome nondisjuction

Question 10

Turners sysndome is caused how

Answer 10

1 x chromosome

Question 11

how is kleinfield syndrome caused

Answer 11

XXY

Question 12

What is a Barr body

Answer 12

inactive X

Question 13

How do male flys cope with 1 X

Answer 13

X works 2X harder

Question 14

What is det^+det^+

Answer 14

Homozygous dominate and Wild Type

Question 15

What is det^+det

Answer 15

Heterozygous

Question 16

what is detdet

Answer 16

homozygous recessive and double mutant

Question 17

What is A+A+

Answer 17

homozygous dominant and double mutant

Question 18

A+a

Answer 18

heterozygous

Question 19

What is AA

Answer 19

Wild type homozygous recessive

Question 20

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

Answer 20

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

Question 21

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

Answer 21

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

Question 22

What are 2 examples of X-linked traits

Answer 22

hemophila and colorblindness

Question 23

What is a sex linked trait

Answer 23

any gene found on X

Question 24

how do sex chromosome know they are homologus

Answer 24

pseudoautosomal points

Question 25

sex limited traits and example

Answer 25

expressed in 1 sex
milk production

Question 26

sex influnced traits and examples

Answer 26

more frequent in 1 sex than other
baldness

Question 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

Answer 27

complementary gene interaction

Question 28

What does it mean in mice
P is black and albino
F1 is agouti
F2 9 agouti 3 black 4 albino

Answer 28

epistasis need one gene to have color other wise one gene will be masked even if its dominant

Question 29

how does DNA becomes phenotype

Answer 29

DNA —> RNA —> Protein —> enzyme

Question 30

what is the recessive gene

Answer 30

inactive enzyme

Question 31

Who found 1 gene 1 enzyme hypothesis

Answer 31

Beadle and tatum

Question 32

1 gene 1 enzyme hypothesis

Answer 32

1 gene codes for 1 enzyme but may also code for structural protein

Question 33

explain a biochemical pathway

Answer 33

X—> O1 —> O2 —> O3 —> pigment
. G1 G2 G3 G4
. most dangerous mutant least dangerous mutant

Question 34

Complementation

Answer 34

2 different genes will complement each other and 2 mutation occur in different genes

Question 35

If 2 mutant white flowers produce a white flower what does that mean

Answer 35

the do no complement each other and the 2 mutations occur on same gene

Question 36

If 2 mutant white flowers produce a red flower what does that mean

Answer 36

the do complement each other and the 2 mutations occur on different genes

Question 37

using reciprocal crosses which help += complement
- =does not complement. the complement groups are?
. 1 2 3 4 5
1 - + - +
2 + - +
3 + +
4 +

Answer 37

group 1: 1,2,4
group 2: 3
group 3: 5