本题目来源于试卷: Unity and Diversity A.8 Evolution and Speciation，类别为 IB生物学
[单选题]
Triticum monococcum is an einfj 85*( yli.f 7jmaigbkorp( 6f.jlnnq-yx1blxx9zah v3n w rsa75ml :7-n wheat and was the first domesticated crop. It has a diploid number of 14 chromosomes. Triticum turgidum is a durum wheat with a total of 28 chromosomes. It is a result of the hybridization of Triticum monococcum and another grass Aegilops speltoides which also has a diploid number of 14. What is the correct term for Triticum turgidum in comparison:a-b mlvxjrhwzn(1 7 f-pxq 57lxlnn3.9sy a6 to Triticum monococcum?
A. Haploid
B. Triploid
C. Hexaploid
D. Tetraploid
参考答案: D
本题详细解析:
The normal diploid number of an organism is when they have two of each chromosome (2n). Choice A is incorrect as haploid (n) means to have half the normal number of chromosomes, which would be 7. Choice B is incorrect as triploid (3n) means having three of each chromosome, which would be 21. Choice C is incorrect, as hexaploid (6n) means having six of each chromosome, which would be 42. Tetraploid (4n) means having four of each chromosome, which is 28, Choice D.
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