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TLS Online TPP Program

#Question id: 12755

Which of the following statements best describes why biologists are currently concerned with global warming and the thawing of permafrost in many areas of the tundra biome?

#Part-B Specialized Branches in Biotechnology
  1. The thawing process will likely decrease the abundance and diversity of soil-dwelling organisms in tundra habitats.
  2. The bacterial decomposition of  the thawed organic materials on  the widespread areas of  the tundra will produce large quantities of CO2, which will add to greenhouse gases and exacerbate global warming.
  3. Oil and coal deposits will thaw and rise to the surface (because of their lower density) of the tundra, destroying millions of acres of arctic habitat.
  4. Populations of humans inhabiting the arctic will have to move to more southern latitudes, resulting in in- creased competition for resources in already densely populated areas.
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TLS Online TPP Program

#Question id: 5431

#Part-A Aptitude & General Biotechnology

Plant having height 6 cm are allowed to cross with plant having height 2 cm , all F1 progeny having height uniform 4 cm were allowed selfing to produced F2 progeny in which 3 plant out of  8 having height  4 cm . what are number of polygene involve in that trait ?
TLS Online TPP Program

#Question id: 5432

#Part-A Aptitude & General Biotechnology

which of the following are not feature of polygenic inheritance ?
TLS Online TPP Program

#Question id: 5433

#Part-A Aptitude & General Biotechnology

Two varieties of maize averaging 120 and 80 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 100 inches in height. If height is control by 3 pair of polygene, what is proportional of averaging phenotype in their F2 progeny?
TLS Online TPP Program

#Question id: 5434

#Part-A Aptitude & General Biotechnology

Plant height of wild Solanum nigrum is controlled by polygene. A pure line plant with 60 cm height was cross to pure line plant having 20 cm height .All F1 plant having uniform height 40 cm. F1 plant was allowed to self-fertilization to produced 4/64 proportional of F2 plant having height 20 cm . What is number of polygene governing plant height?
TLS Online TPP Program

#Question id: 5435

#Part-A Aptitude & General Biotechnology

A polygenic trait is controlled by three genes-A, B and C. In a cross, AaBbCc x AaBbCc, what is a probability of intermediate phenotype offspring?
TLS Online TPP Program

#Question id: 5436

#Part-A Aptitude & General Biotechnology

Quantitative characteristics arise from two phenomena either polygenic or environmental influence on genotype. Which of the following is not character of quantitative polygenic trait?