What condition may occur in a zygote if a sperm has nondisjunction of the sex chromosomes?

a. cancer
b. down's syndrome
c. klinefelter's syndrome
d. triple x syndrome


Answer: c. klinefelter's syndrome

Biology & Microbiology

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Small circular, extrachromosomal DNA segments are known as _______.  

A.  vectors B.  plasmids C.  clones D.  RNA

Biology & Microbiology

The compounds involved in phototropism are ____

a. phototropins b. gibberellins c. cytokinins d. phytoestrogens e. statoliths

Biology & Microbiology

If a plant were placed in continual darkness, it would continue to open and close its stomata at

approximately the same time each day. This phenomenon is governed by: a. annual rhythms. b. floral clocks. c. transpiration. d. temporal mechanisms. e. circadian rhythms.

Biology & Microbiology

In what way are eyes and eyespots similar to each other?

a. They are both simple. b. They both sense light. c. They are both big. d. They both sense the absence of light.

Biology & Microbiology