AP BIOLOGY

LABORATORY REVIEW

MITOSIS AND MEIOSIS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

The jimsonweed Datura stramonium normally has 12 chromosomes in the body cells. How many chromosomes will an egg cell of the weed have?

A	12
B	24
C	6
D	8

Explanation:

Detailed explanation-1: -(2003-7) The jimsonweed Datura stramonium, normally has 12 chromosomes in the body cells. How many chromosomes will an egg cell of the weed have? 10.

Detailed explanation-2: -Belling showed that the jimsonweed has 12 chromosome pairs, each of which could show trisomy. Each case of trisomy produces a unique phenotype.

Detailed explanation-3: -The number of chromosomes in the G2 phase will be same as 12 chromosomes and the number of chromatids will be 24.

Detailed explanation-4: -The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells.

Detailed explanation-5: -Correct. During metaphase each chromosome consists of two identical, double-stranded DNA molecules. Therefore, if a cell normally contains 12 chromosomes, there will be 24 molecules of DNA during metaphase.

There is 1 question to complete.