Home › Tamil Nadu SSLC (Class 10) › Biology › Genetics › Which term refers to the external, observable ex…
Which term refers to the external, observable expression of a particular trait in an organism?
AGenotype
BPhenotype
CAllele
DLocus
Answer & Solution
Correct answer: B. Phenotype
1. The external expression of a trait, such as tall or dwarf, is called the phenotype.
2. The genetic make-up that underlies it, such as TT or Tt, is the genotype, which rules out option A.
3. So the observable expression is the phenotype, option B.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 18 Genetics "Monohybrid Cross", p.269_
Related questions
Which one of these is found in human males only?Sickle cell anaemia results from a change in the nucleotide sequence of a single gene. ThiThe gain or loss of one or more chromosomes from a normal set, as seen in Trisomy and MonoDown's syndrome in humans is caused by the presence of an extra copy of which chromosome?In the context of human sex chromosomes, why is the human female described as homogametic?If an egg carrying X fuses with a sperm carrying Y, what will be the sex chromosome make-uIn humans, the sex of a child is determined by the type of sex chromosome carried by whichWhich enzyme binds at the origin of replication and separates the two strands of the DNA m