CBSE 2024 · Region 5 · Set 1 · Q17 · 2 marks
"Farmers prefer apomictic seeds to hybrid seeds." Justify giving two reasons.Mention one advantage and one disadvantage of amniocentesis.
"Farmers prefer apomictic seeds to hybrid seeds." Justify giving two reasons.
Mention one advantage and one disadvantage of amniocentesis.
Marking-scheme solution
Hybrid seeds show segregation of characters in the progeny, production of
hybrid seeds are expensive / apomictic seeds would be cheaper if produced , hybrid seeds have to be produced every year, apomictic seeds brings homozygosity / apomictic seeds retain desirable characterstics of plants.
Advantage – used to diagnose any chromosomal abnormality or genetic
disorder such as down syndrome, haemophilia,sickle cell anemia in foetus , determine survivability of foetus .
Disadvantage – used to determine the sex of the foetus which may lead to female foeticide.
Sexual Reproduction in Flowering PlantsPre-fertilisation: Structures and EventsUnderstandvery_short_answermedium
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CBSE Class 12 Biology past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.