Help me 8,9,10,11 !! explanation will be great for me 8, what is the statistic f

Question

Help me 8,9,10,11 !!
explanation will be great for me

8, what is the statistic for the following data (total error using chi-square): a) 100 b) 20 c) 4 d) 1 Observed Expected 20 60 20 25 50 25 9. What chromosomal region is required for relocating each chromosome to the metaphase plate? a) Centromeres b) Telomeres Chromatin c) d) Chiasmata 10. Kinetochore microtubules are used to push the opposing spindle poles apart. a) True b) False 11. For a cross between two Aa Bb Cc individuals, what fraction of the offspring will be AA bb Cc? a) none b) 1/64 c) 3/64 d) 1/32 e) 1/4

Explanation / Answer

8. 4

Chi square= sum of ( observed value -expected value )/ expected value

                        

= ( 20-25)2 / 25 + (60-50) 2 /50 +(20-25) 2 /25

= (-5) 2 / 25 +( 10)2 / 50 + (-5) 2 / 25

=25/25 + 100/50+ 25/25=

=1 + 2+1= 4

9. A) centromere

10. true

11. d) 1/32

Aa Bb Cc X Aa Bb Cc

lets divide them to Aa X Aa, Bb X Bb, Cc X Cc

A

a

A

AA

Aa

a

Aa

aa

B

b

B

BB

Bb

b

Bb

bb

C

c

C

CC

Cc

c

Cc

cc

thus

AabbCc = ¼ X ¼ X ½ = 1/32

A

a

A

AA

Aa

a

Aa

aa

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