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yKpoI14uk [10]
3 years ago
10

A sense of belonging activates the _____ , the brain region associated with safety.

Biology
1 answer:
Sergeeva-Olga [200]3 years ago
6 0
A sense of belonging activates the prefrontal cortex. Prefrontal cortex is the front brain region associated with safety. It's also connected with person's will to live, decision making, moderating social behavior, determine good and bad, same and different.
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In Drosophila, the genes for body coloration and eye size are on different chromosomes. Normal-colored bodies are dominant to eb
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Answer:

225 flies

Explanation:

Let gene for body colour : A

Let gene for eye type : B

Parent 1 : normal body and normal eyes = AABB

Parent 2: ebony body and eyeless = aabb

F1 : AABB X aabb = AaBb ( all have normal body and normal eye )

F1 progeny is self crossed given that the two genes are on different chromosomes which means they show independent assortment:

AaBb X AaBb =

A_B_ = normal body, normal eyes = 9

aaB_ = ebony body, normal eyes = 3

A_bb = normal body, eyeless  = 3    

aabb = ebony body, eyeless  =   1

Hence the ratio is 9 : 3 : 3 : 1

Out of the 400 flies:

(9/16) * 400 = 225 flies have normal body colour and normal eyes

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