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Showing posts with the label chromosomal theory

Dunaliella salina - Overview

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                 Dunaliella salina Dunaliella salina is a unicellular microalgae belong to division Chlorophyta . It is found in salinity environments such as salted brines, salt evaporation ponds, and hypersaline lakes  .It is able to tolerate varying NaCl concentrations, ranging from 0.2% to approximately 35% . Thus, Dunaliella salina is a hyper-halotolerant organism found in high densities in saline lakes.  The ability to tolerate high salt concentrations is advantageous, since competition is minimal in high salt concentration areas.  How D.salina   tolerate high salt concentration? D. salina has adapted to survive in high salinity environments by accumulating glycerol to balance osmotic pressure. Note :  D. salina is also adapted to solar radiation using β-carotene to protect against ionizing energy.                 Red Colour of Salt Brines  Dunaliella salina...
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Chromosomal theory,linkage theory,sex determination(part 6)

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     link of basic terminology(part1)      link of mendel work(part2)      link of part 3     link of genetics(part4)      link of genic inheritance(part5)   Chromosomal theory of Inheritance According to this theory,inheritance of characters from one generation to another occurs due to chromosomes. **Chromosomal theory and mendelian factors show parallelism with each other. 1) Both chromosome as well as mendelian  factors retain their number,structure and individuality during the process of transmission. 2)Both are neither get lost,nor mixed up. 3)Both occur in pair in diploid organisms and behave as a unit. 4)Both segregate from their respective paired unit at the time of gamete formation , hence gamete receive or contain only one allele af a gene pair and only one pair of homologous chromosome. 5)Paired condition of both chromosome as well as genes is restored after fertilisation. 6)Chromosome and mendeli...
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