Unity and Diversity A.6 Diversity of Organisms (id: c745b79af)

本题目来源于试卷: Unity and Diversity A.6 Diversity of Organisms，类别为 IB生物学

[单选题]
What type of human cell does the followi4vpz/wk (um ,f +*zbrbghw56 cng karybmrtiuhc:*742lm 42 zx w5p(mxewm2 xogram represent?

A. Sperm
B. Egg
C. Brain cell
D. Skin cell


参考答案:  A


本题详细解析:
Choice A is correct because there nnwp4p*z (7lc are 23 chromosomes, so it is a haploid cell, and one of the sex chromosomes is the ‘Y’ chromosome. Egg cells do not have the Y chromosome. Choice B is incorrect bec( nl p47n*zwpcause all egg cells have one ‘X’ sex chromosome. Choice C and choice D are incorrect because skin and brain cells are diploid, so they have two of each chromosome: 46 in total.

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