CUET English 2024
Reading Comprehension
Passage
Easy
Coffee's genetic makeup is no trivial concern; 10 million tonnes of coffee were grown and sold in 2022-2023. The coffee that we drink comes from two different species; Coffee Canephora which is also known as Robusta and Coffee Arabica known as Arabica. In many cases beans from two species are blended to make a brew. But the beans of single species are also roasted and sold. Overall, Arabica beans represent around 56% of the coffee beans sold .Most genetic variations in living organisms comes from hybridisation with other species. Howewer, this is a relatively rare event from Coffee Arabica because it has more than two copies of each chromosome - a phenomenon called polyploidy. Coffee Canephora has two copies of each chromosome but Coffee Arabica contains multiple copies. This makes it much more difficult for Coffee Arabica to interbreed with other species.As a result Coffee Arabica's main source of single nucleotide is mutation, which occurs at a steady rate over time. Howewer, the species is also relatively young, formed as a hybrid of Robusta and Coffee Eugeniodes - another coffee species which is not widely cultivated - within the past 50,000 years. From that single plant , which has basically no variation, you create the whole species , and then the variation is only the novel mutations that have occurred since that event.Despite this there is substantial variation in physical characteristics of the Arabica Plant,including avrious flavour profiles in the beans and variations in disease resistance , says emeritus geneticist Juan Medrano at the UC Davis Coffee Centre at the University of California, Davis. "We are always talking about the low variability at the DNA level , but there is great variability at the structural level , at the chromosomal level , at the level of deletions ... insertions, " Medrano says.
Which of the following statements is true about Coffea Arabica?
Which of the following statements is true about Coffea Arabica?
Correct Option: 3
"This makes it much more difficult for Coffee Arabica to interbreed with other species" -> Not easy to interbreed"Coffee Arabica contains multiple copies... a phenomenon called polyploidy" -> Arabica has polyploidy"Coffee Arabica's main source of single nucleotide is mutation" -> Not hybridization-> Option 1: Hybridization main source - False -> Option 2: Two chromosome copies - False -> Option 3: Displays polyploidy - True ✓ -> Option 4: Easily interbred - FalseThe answer is Option 3 - It displays the phenomenon of polyploidy.
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CUET English 2024
CUET English 2024