Which is NOT included in the appendicular skeleton?

Biology

1 answer:

Anon25 [30]2 years ago

7 0

Answer:

=> C. ribs

Explanation:

=> The appendicular skeleton is composed of the bones of the pectoral limbs (arm, forearm, hand), the pelvic limbs (thigh, leg, foot), the pectoral girdle, and the pelvic girdle.

=> Ribs is a part of the axial skeleton.

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First, write out all combinations for the parents:
SsBB:
SB
sB
SB
sB

ssBb:
sB
sb
sB
sb

So now that you know what to put on as the x and y for the Punnett Square, set it up:

 | SB | sB | SB | sB 
sB | SsBB | ssBB | SsBB | ssBB 
sb | SsBb | ssBb | SsBb | ssBb 
sB | SsBB | ssBB | SsBB | ssBB 
sb | SsBb | ssBb | SsBb | ssBb 

Now, listing each possible genotype and the number of times they show up in the square:
SSBB
0 times
SSBb/SSbB
0 times
SSbb
0 times
SsBB/sSBB
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SsBb/SsbB/sSBb/sSbB/
4 times
Ssbb/sSbb
0 times
ssBB
4 times
ssBb/ssbB
4 times
ssbb
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Since there are only 4 genotypes are possible, set up ratios of those four:

SsBB:
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SsBb:
4 times/16 total = .25 = 25%

ssBB:
4 times/16 total = .25 = 25%

ssBb:
4 times/16 total = .25 = 25%

This means that the genotypes have a 25% : 25% : 25% : 25% likelihood.

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SsBB:
Ss = dominant
BB = dominant

SsBb:
Ss = dominant
BB = dominant

ssBB:
ss = recessive
BB = dominant

ssBb:
ss = recessive
Bb = dominant

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2/4 = 50% Thin stripes with black eyes, and
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I hope this helped you out :)

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