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24 Jun 2019

How are rRNA genes organized in higher eukaryotes? How many rRNA genes are there per cell? Why? How do we believe that the sequences of the individual genes kept virtually identical?

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Nestor Rutherford
Nestor RutherfordLv2
24 Jun 2019

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Related questions

Needs help asap

_______________ are transposable elements that move within the genome by being copied and reinserted as DNA sequences, avoiding the need for reverse transcription"

A.

Retrotransposons
B

Retrovirus-like elements
C

DNA transposons
D

Satellite DNAs
E

Long interspersed elements (LINEs)

F.Short interspersed elements (SINEs)

The large differences observed in genomic size among eukaryotes correspond primarily to differences in

A

the amount of protein-coding genes
B

the amount of noncoding DNA
C

the biological complexity of the organisms at hand
D

the length of the telomeres

E the size of the centromere

The study of lncRNAs has revealed

A

that protein-coding genes are distributed homogeneously throughout the genome
B

that splicing regulates more genes than initially expected
C

that miRNAs are mostly limited to intronic sequences
D

that only a relatively small fraction of the human genome is ever transcribed
E

the existence of genomic regions coding exclusively for rRNA and tRNA
F

that extensive regions of our genome are in fact actively transcribed even though they do not contain protein-coding genes

How is genetic material organized? In your answer make sure to include:

A. How we can differentiate between a gene and an allele, including the recognition that genes may have many alleles.

B. How the positions of individual genes on a given chromosome are related to their positions on the homolog of that chromosome.

(EVOLUTION)

7. How do we classify living organisms? What are taxa? How do they relate to clades?

8. Describe some of the “contributions” of prokaryotes to all of life on Earth.

9. Based on DNA sequence analysis (primarily of their small subunit rRNA genes) major clades of life have been proposed as the Bacteria, Euryarchaea, TACK (Archaea minus the Euryarchaea) and Eukarya.

a. What traits do the Archaea (Euryarchaea and TACK) share with Bacteria? With Eukarya?

b. Draw a simple tree to describe this new thinking.

10. Human are good long-distance runners. Why?

11. Give an example of a trait that evolved in humans and can best be explained by:

a) Sexual selection –

b) Group selection –

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