FL 2 Q7 Bio/Biochem

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MCATx2
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FL 2 Q7 Bio/Biochem

Post by MCATx2 » Mon Apr 30, 2018 1:49 pm

Individuals with a translocated (q14; q21) chromosome instead of two normal chromosomes 14 and 21 are called ROB carriers.

So why is the answer 45 chromosomes if you are an ROB carrier?

Shouldn't it be 22 somatic chromosomes - 2 chromosomes (14 and 21) = 20 chromosomes + 1 translocated chromosome = 21 + 2 sex chromosomes = 23 * 2 = 46?

Can someone help explain this one?

Thank you
Snazia
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Re: FL 2 Q7 Bio/Biochem

Post by Snazia » Sat May 12, 2018 11:01 pm

As the passage states, part of the RO Syndrome is that two of your chromosomes are fused into one, so you would end up with one less than a normal number.
NS_Tutor_Katelyn
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Re: FL 2 Q7 Bio/Biochem

Post by NS_Tutor_Katelyn » Thu Jun 07, 2018 2:12 pm

Snazia wrote:As the passage states, part of the RO Syndrome is that two of your chromosomes are fused into one, so you would end up with one less than a normal number.
Correct.
Katelyn Sawyer
Senior Tutor
katelyn@nextsteptestprep.com
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