How does crossing over during meiosis produce genetic diversity among the sex cells of a single organism?
What will be an ideal response?
At the start of meiosis, cells have two of each kind of chromosome—a maternal chromosome from the mother and a paternal chromosome from the father. Every time meiosis occurs, crossing over takes place at different points along these chromosomes. This means that, because of crossing over, each chromosome in an organism's eggs or sperm ends up being a unique mix of its maternal chromosome and its paternal chromosome.
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Which statement best describes the use of English on the Internet?
A) English has become less dominant but is still the leading Internet language. B) Different Internets exist for most other widely spoken languages, like Chinese, Japanese, and Russian. C) The number of English-speaking Internet users remains above 50 percent. D) English has become more dominant as the most common language on the Internet. E) No one seems to be able to spell English correctly anymore.
At present, the world population is growing at about 8.5 percent per year for a doubling time of 20 years.
Answer the following statement true (T) or false (F)
The side of a fault above an inclined fault surface is the hanging wall.
Answer the following statement true (T) or false (F)
The greenhouse gas produced from most landfills is ________
A) methane B) ozone C) water vapor D) carbon dioxide E) nitrogen