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Is it true crossing over decreases the genetic variability in humans?
Wiki User
∙ 11y ago
yes, generally it does but does he opposite in animals
Wiki User
∙ 11y ago
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How does crossing over explain genetic variability?
Normally the genes on a chromosome are inherited as a complete set. If you get that chromosome you get all the genes on it. In the process of crossing over similar sections of DNA are swapped from one chromosome to another. This means that different pairings of genes will be inherited together going forward.
What would happen if crossing over didn't happen during meiosis in humans?
There would be less genetic variation in humans
What are the sources of genetic variation in bacteria and humans?
The most important source of variability in bacteria is mutation.
Why might it be difficult to perform genetic analysis in humans?
It takes many generations for humans to mature, grow, and die making them not the ideal subject for genetic analysis because there lifetimes are so long.
What would be would be the least satisfactory organism for genetic research?
humans
How does crossing over explain genetic variability?
Normally the genes on a chromosome are inherited as a complete set. If you get that chromosome you get all the genes on it. In the process of crossing over similar sections of DNA are swapped from one chromosome to another. This means that different pairings of genes will be inherited together going forward.
What causes genetic variations in humans?
meiosis... for example.. crossing over
Is crossing over a chromosomal abnormality?
No, it is normal for chromosomes to cross over. Crossing over is how we humans have genetic diversity.
What would be the result if crossing over didnt happen during meiosisin humans?
There would be less genetic variation in humans
What would happen if crossing over didn't happen during meiosis in humans?
There would be less genetic variation in humans
Why is it important for humans and other animals to keep large areas of forests with many trees and other green plants?
Because sustainibility of an ecosystem largely depends on genetic variability.
How does crossing over contribute to genetic diversity?
Crossing over in Prophase I in Meiosis aids genetic diversity because it allows for more unique combinations of chromosomes to be produced. Genetic variability strengthens a population, and influences evolution. 2n= # of possible gamete possibilities. In humans, this number is 46. n= # of chromosomes, which is 23 in a single cell. 2^23= 8 million different gamete possibilities, without any crossing over. A resulting zygote (result of the fertilization of the sperm gamete and egg gamete) would have 2^23 * 2^23 = over 7 trillion possibilities of chromosome combinations. All of this, of course, is without crossing over. The numbers become infinitely high once genetic material is exchanged between two sets of homologous chromosomes during Prophase I.
What are the sources of genetic variation in bacteria and humans?
The most important source of variability in bacteria is mutation.
Why do humans not have the same genetic information as someone else?
the genetic coding of humans is different. thats why chimpanzee is different from humans. as simple as that.
What is the new technology that humans use to alter the genetic instructions in organisms?
genetic engineering
What is an Orangutans organism?
Same as humans. Orangutans share about 97% of their genetic information with humans.
Describe how the chemical composition and the genetic information of humans resembles the chemical and genetic information of other organisms?
Humans share about 95% genetic similarity with mice. http://www.bookrags.com/research/model-organisms-gen-03/
