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Rajasthan GK Important Question Answer (Part-9)
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In this Course, we will learn Important questions on GK for Rajasthan Police Service Exam

Jaypal Bhakar
M. Sc. In Organic Chemistry, B.Sc. In PCM, Educatar, Youtuber YouTube channel name "Let's Learn with Jepybhakar" Currently Selected In RPSC.

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Unacademy user
plzz clarify.... you spoke of dominant and recessive traits and how they are represented in genetics. I want to ask that is tallness a dominant trait bcoz it is capable of showing iself up in the population or is it called dominant bcoz it is desirable?? What is the actual process which decides that which traits we r going to inherit from our father and which traits from our mother??plz share a link to video or something will you please also make a video on how blood groups are determined in human beings
Siva Prasad
2 years ago
Well, tallness is dominant because if you have "Tt" then also tallness gets expressed in other words it is able to dominate the other character by its presence hence it has nothing to with desirability. As far as what you inherit from your parents is concerned you inherit a copy of everything but what determines what gets expressed is the dominance and recessiveness. Ex. if the mother is short (tt) and father (TT)is tall the child gets "t" from mother and "T" from father and hence child gets "Tt" ultimately and if "T" is the dominant trait the child is tall. Now let's assume the father has blue eyes (bb) and mother has black eyes (BB) the child gets "b" from father and "B" from mother thus making it "Bb" now assuming black eyes is the dominant trait the child will have black eyes. So the child is tall and has black eyes. You can do the same for other characteristics also, pummets square will help you identify the final outcome/ characteristics. Plus I would like to point out that since DNA copying is not perfectly accurate that is the reason the child doesn't look exactly like the parent and hence can have features that are absent in either of them and also what gets inherited and what not is a chance of probability also, as i said draw and pummet square, know which trait is dominant and you will able to find out the outcome of the characteristics in a child. Hope I have clarified your doubt.
Siva Prasad
2 years ago
Thank you for bringing the topic regarding blood groups, I will definitely make a video and explain the concepts associated. Good luck!
Shiva Rajora
2 years ago
thanxx a lot sir.... so u r saying that heredity process is complex and no trait can always be said to be dominant or recessive. whatever gets showed up in a progeny can be assumed as dominant??
Siva Prasad
2 years ago
Heredity process is more complex than the way we have generalized it using pea plants but as far as dominance and recessiveness is concerned, the dominant trait if present will always dominate, ex. if you have "Tt" since "T" is dominant if it is present it will always get expressed. ie. if the dominant trait is passed on the to the next generation it will dominate/express itself. The complexity is in how and which traits get passed on. But to answer you any trait that is dominant if it is present will dominate be it the allele for tallness or black eye color
Shiva Rajora
2 years ago
I got it. Thank u sir..