Solution-Properties of prokaryotic cells

All of the following are properties of prokaryotic cells, EXCEPT

They contain many types of organelles  They are usually smaller cells than eukaryotic cells  The DNA is concentrated in a nucleoid region, which is not enclosed by a membrane. They are very simple structures.

 

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A single crossover between genes 6 and 7

Q. An inversion heterozygote possesses a normal chromosome and one with an inversion. The gene orders in these 2 chromosomes are shown below- Normal 1 2 3 4 5 6 7 8 9 10 o. The “o” denotes the centromere. Inverted 1 2 3 9 8 7 6 5 4 10 o. Represent the structure of chromosomes after meiosis given the follow events-

(a) A single crossover between genes 6 and 7.

(b) A 2-strand double crossover with one crossover between genes 4 and 5 and one between genes 7 and 8.

(c) A 4-strand double crossover with one crossover between genes 4 and 5 and one between genes 7 and 8.

 

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Current competing theories of the origin of life on earth

Discuss the issues related to genetic diversity: mutations, sexual reproduction, migration, and population size.

Summarize the three (3) current competing theories of the origin of life on Earth: it arrived from an extraterrestrial source, it originated as a heterotroph, it originated as an autotroph.

 

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Human microbiome, a diverse collection of microorganisms

The human microbiome, a diverse collection of microorganisms living inside us and on our skin, has attracted considerable attention for its role in a broad range of human health issues. Now, researchers are discovering that the built environment also has a microbiome, which includes a community of potentially-pathogenic bacteria living inside water supply pipes.

Please read:https://www.sciencedaily.com/releases/2016/03/160314111129.htm

What are biofilms?

 

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