If a heritability of blood pressure is 0.6, then __.
A. 60% of an individuals genes affect blood pressure
B. An individual whose parents both have high blood pressure has a 60% chance of developing the same condition
C. Genes determine 60% of an individuals blood pressure
D. Genetic differences in a population account for 60% of the observed variation in blood pressure in the population
E. In 60% of people who have high blood pressure, the condition can be attributed to genes
If a heritability of blood pressure is 0.6, then __.
A. 60% of an individuals genes affect blood pressure
B. An individual whose parents both have high blood pressure has a 60% chance of developing the same condition
C. Genes determine 60% of an individuals blood pressure
D. Genetic differences in a population account for 60% of the observed variation in blood pressure in the population
E. In 60% of people who have high blood pressure, the condition can be attributed to genes
A. 60% of an individuals genes affect blood pressure
B. An individual whose parents both have high blood pressure has a 60% chance of developing the same condition
C. Genes determine 60% of an individuals blood pressure
D. Genetic differences in a population account for 60% of the observed variation in blood pressure in the population
E. In 60% of people who have high blood pressure, the condition can be attributed to genes
Ans. Correct option. D.
Heritability is defined as “the proportion of total variation among individuals in a given population due to genetic variation.” A heritability of 1.0 means that the variations in a trait among individuals of a population is solely due to their genetic makeup; and it remains unaffected by influences of environmental factors.
A heritability of 0.6 (= 60 % = 60/100 = 0.6) indicates that D. genetic difference in population is responsible for 60% of the observed variations in blood pressure in the population. The remaining 40% variation of the trait among individuals in the population arises due to environmental factors like geographical location, life-style, food-habits, etc.
Note: Note that heritability does not measure the relative contribution of genotype for determining a trait. For example, its’ INCORRECT to say that a heritability of 0.6 means “60% of the trait is contributed by genotype of the individuals”
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