Cystic fibrosis is caused by a recessive allele. Roughly one out of every 500 individuals (0.20%) have this disease. Using the Hardy-Weinberg equation, the percentage of individuals who are carriers of the recessive allele for the disease is:
The Hardy-Weinberg equation states:
p2 +2pq + q 2 = 1 and p + q = 1
where:
Cystic fibrosis - f(aa) = 0.002
q2= 0.002
q = 0.04
p = 1 - 0.04
p = 0.96
(carrier ) 2pq =
=
= 7.68 answer
Colour blindness affects approximately 1 in 12 men (8%). In a population that is in Hardy-Weinberg Equilibrium (HWE) where 8% of men are colour-blind due to a sex-linked recessive gene. What proportion of women are expected to be carriers?
Select the correct option that describes the above graph regarding length of bird’s bill:
Convergent evolution creates:
In a population that is in Hardy-Weinberg equilibrium, the frequency of the recessive homozygote genotype of trait q is 0.04. The percentage of individuals homozygous for the dominant allele is:
Sexually reproducing organisms employ signals to attract mates. If such signals honestly reflect an individual’s quality, then which of the following is expected?
In a particular population A, individuals are under stress and they produce smaller offspring. Based on this, one may conclude that:
The following statements explain various evolutionary outcomes:
A. Within a lineage, organisms show a constant rate of extinction.
B. Even in the absence of changing interactions, organisms are constantly evolving.
C. Organisms with novel genotypes are at a selective disadvantage.
D. Coevolution between two interacting species act to maintain genetic variation through time.
Which of the following combinations of the above statements are supported by the ‘Red Queen hypothesis’?
The following are selected plant apomorphies:
A. Development of xylem
B. Development of cuticle
C. Development of independent sporophyte
D. Development of eustele
Which option represents the correct evolutionary sequence of the above?
Synonymous mutations (solid black circle) and non-synonymous mutations (different symbols) are plotted on two hypothetical phylogenies (A and B) given below.
The phylogenies above may represent the following types of selection - positive, negative or neutral. Which one of the options given below gives the correct combination of the types of selection observed in phylogenies A and B?
In a population, the frequency of allele 'a' is 0.2 and that of allele 'b' is 0.1. Consider that there are two alleles for each of the genes. What would be the expected percentage of population with genotype AaBb, considering that the population is under Hardy-Weinberg equilibrium?
