Question:
At a particular locus, frequency of allele $A$ is $0.6$ and that of allele a is $0.4$. What would be the frequency of heterozygotes in a random mating population at equilibrium?
At a particular locus, frequency of allele $A$ is $0.6$ and that of allele a is $0.4$. What would be the frequency of heterozygotes in a random mating population at equilibrium?
Updated On: Jun 10, 2026
- $0.36$
- $0.16$
- $0.24$
- $0.48$
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
In a stable population, for a gene with two alleles, 'A' (dominant) and 'a' (recessive), if the frequency of 'A' is $p$ and the frequency of 'a' is q, then the frequencies of the three possible genotypes (AA, Aa and aa) can be expressed by the Hardy-Weinberg equation:
$p^{2}+2pq+q^{2} =1$
where $p^{2}$ = Frequency of $AA$ (homozygous dominant) individuals
$q^{2}$ = Frequency of $aa$ (homozygous recessive) individuals
$2pq$ = Frequency of Aa (heterozygous) individuals
so, $p = 0.6$ and $q = 0.4$ (given)
$\therefore$ $2pq$ (frequency of heterozygote) $=2 \times 0.6 \times 0.4$
$=0.48$
$p^{2}+2pq+q^{2} =1$
where $p^{2}$ = Frequency of $AA$ (homozygous dominant) individuals
$q^{2}$ = Frequency of $aa$ (homozygous recessive) individuals
$2pq$ = Frequency of Aa (heterozygous) individuals
so, $p = 0.6$ and $q = 0.4$ (given)
$\therefore$ $2pq$ (frequency of heterozygote) $=2 \times 0.6 \times 0.4$
$=0.48$
Was this answer helpful?
0
0
Top NEET Biology Questions
- The chronological order of human evolution from early to the recent is
- Upper part of sea/aquatic ecosystem contains
- Where is respiratory electron transport system (ETS) located in plants ?
- Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?
- Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair. .
Pair of skeletal parts Category (a)$\,\,$ Sternum and ribs$\,\,$ Axial skeleton (b)$\,\,$ Clavicle and glenoid cavity$\,\,$ Pelvic girdle (c)$\,\,$ Flumerus and ulna$\,\,$ Appendicular skeleton (d)$\,\,$ Malleus and stapes$\,\,$ Ear ossicles
View More Questions
Top NEET Evolution Questions
- Which one of the following options gives one correct example each of convergent evolution and divergent evolution?
Convergent evolution Divergent evolution (a) Eyes of octopus and mammals Bones of forelimbs of vertebrates (b) Thorns of Bougainvillea and tendrils of Cucurbita Wings of butterfly and birds (c) Bones of forelimbs of vertebrates Wings of butterfly and birds (d) Thorns of Bougainvillea and tendrils of Cucurbita Eyes of octopus and mammals - Correct order is
- Diversification in plant life appeared
- Similarities in organism with different genotype indicates
- Which of the following is correct order of the evolutionary history of man
View More Questions
Top NEET Questions
- A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?
- The time constant of C-R circuit is
- The chronological order of human evolution from early to the recent is
- The correct Boolean operation represented by the circuit diagram drawn is :
- The driver of a car travelling with speed $30\, m/sec$ towards a hill sounds a horn of frequency $600\, Hz.$ If the velocity of sound in air is $330\, m/s,$ the frequency of reflected sound as heard by driver is
View More Questions
Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.