Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
People who carry an allele for normal haemoglobin and an allele for sickle cell are resistant to malaria. They are examples of:
Answer 1. The heterozygote does not develop severe malaria and severe anemia as well.
In a population of red (dominant) and white flowers, the flowers of red flowers is 91%. What is the frequency of the red allele?
Answer 4. The white flowers are 9% or the frequency of the recessive allele would be 0.3 or 30%. The frequency of the dominant allele would be 70%
The similarities between the eyes of an octopus and of a mammal are a result of:
1. Page 131, XII NCERT
Most fossils are found in:
Sedimentary rocks
Genetic drift occurs when a few individuals of a species colonize an island. The particular phenomenon is known as:
(b) In population genetics, the founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of individuals of a larger population. It was first fully outlined by Ernst Mayr in 1942, using existing theoretical work by those such as Sewall Wright.
The oldest fossils resemble:
Answer: 3
Factual
Lamarck's theory of evolution is also called
Jean Baptiste de Lamarck proposed "theory of inheritance of acquired characters" or populary known as "use and disuse" theory.
Analogous structures are a result of
(a) Analogous structures are a result of convergent evolution. When organisms with completely different organisation, living in the same habitat come to possess superficial resemblance, this is known as convergent evolution.
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as
(b) Genetic drift is a random change in allele frequencies over the generations. It is brought by chance alone. Gene flow or gene migration is the physical movement of alleles into and out of a population. The existence within the population of disadvantages alleles in heterozygous genotypes is known as genetic code.
The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common enviroment challenge, is called
(b) Convergent evolution occurs in unrelated group of organisms. It is the development of similer functional structure but in unrelated groups.
The process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography is called adaptive radiation. Natural selection is the basis of evolution.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.