1) A man is found to be karyotypically 47, XYY. The presence of an extra Y chrom
ID: 58406 • Letter: 1
Question
1) A man is found to be karyotypically 47, XYY. The presence of an extra Y chromosome could be caused by the following: (Choose any and all that alone could lead to the condition)
non-disjunction in a maternal meiocyte at meiosis I.
non-disjunction in a paternal meiocyte at meiosis II.
non-disjunction in a maternal meiocyte at meiosis II.
unequal crossing over.
non-disjunction in a paternal meiocyte at meiosis I.
2) Which of the following is/are NOT a key structural property displayed by the heritable (transforming) material?
Choose any and all answers that are not true.
The structure must allow or tolerate small changes that faciliate non-lethal variation.
The structure must be composed of rare/unusual elements.
The structure must be accurately copied before cell division.
The structure must contain complex information (genetic code).
The structure must be enzymatically active, able to mediate cellular metabolism.
non-disjunction in a maternal meiocyte at meiosis I.
non-disjunction in a paternal meiocyte at meiosis II.
non-disjunction in a maternal meiocyte at meiosis II.
unequal crossing over.
non-disjunction in a paternal meiocyte at meiosis I.
2) Which of the following is/are NOT a key structural property displayed by the heritable (transforming) material?
Choose any and all answers that are not true.
The structure must allow or tolerate small changes that faciliate non-lethal variation.
The structure must be composed of rare/unusual elements.
The structure must be accurately copied before cell division.
The structure must contain complex information (genetic code).
The structure must be enzymatically active, able to mediate cellular metabolism.
Explanation / Answer
Ans-1. (B) , Ans-2. (B)
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