Role of Heredity and Environment — Practice

Q1. Heredity is the sum total of the traits potentially present in which structure?

• A. The newborn infant's brain
• B. The fertilized ovum
• C. The mother's womb at six months
• D. The father's germ cell only

Q2. The fertilized egg (zygote) has 46 chromosomes. How are they contributed by the parents?

• A. 30 from the mother and 16 from the father
• B. 23 from the mother and 23 from the father
• C. 46 from the mother only; the father contributes genes, not chromosomes
• D. All 46 come randomly from either parent

Q3. Approximately how many genes does each chromosome contain?

• A. About 40 to 100 genes
• B. Exactly 23 genes
• C. About 1000 to 2000 genes
• D. Only one master gene per chromosome

Q4. Whose definition of heredity is 'what gets from his ancestral stock through his parents'?

• A. F.L. Ruch
• B. Douglas and Holland
• C. Peterson
• D. Anastasi

Q5. According to Anastasi, environment is everything that affects the individual except

• A. the family
• B. the school
• C. the genes
• D. the peer group

Q6. The mental environment of a school includes which of the following?

• A. Only the classroom blackboard and benches
• B. Library, laboratory, curricular and co-curricular activities
• C. Only the principal's office
• D. Only the playground

Q7. Identical twins develop from

• A. one ovum
• B. two separate ova
• C. three separate ova
• D. an unfertilized egg

Q8. In David Winfield's twin study, the coefficient of correlation on IQ between identical twins is

• A. 0.30
• B. 0.50
• C. 0.70
• D. 0.90

Q9. In the same twin-study table, the IQ correlation between ordinary siblings (brothers and sisters) is

• A. 0.30
• B. 0.50
• C. 0.70
• D. 0.90

Q10. Freeman's study examined how many children moved from a poor environment to a good environment?

• A. 23 children
• B. 46 children
• C. 71 children
• D. 100 children

Q11. In the James-Reace study of twins reared in a hill and a village, the difference in their intelligence scores was

• A. 5 points
• B. 10 points
• C. 19 points
• D. 30 points

Q12. According to Ross, the formula H X E X T = DL means

• A. Heredity + Environment + Time = Development Level
• B. Heredity X Environment X Time = Development Level of an individual
• C. Heredity X Education X Talent = Developmental Learning
• D. Health X Environment X Training = Developmental Lifespan

Q13. In the illustration 'Seeds (heredity) X Soil = Yield', what does the soil stand for?

• A. Heredity
• B. Environment
• C. Time of growth only
• D. The teacher

Q14. Asha, a Class 3 teacher in Rampur, notices wide differences in her students' learning. The educational implications suggest she should first

• A. Punish slow learners until they catch up
• B. Teach only the brightest five students
• C. Provide a congenial atmosphere and treat all students equally, motivating each to adjust with the environment
• D. Send all weak children to a separate school

Q15. An educational implication states that every school must have

• A. a separate hostel for boys and girls
• B. a guidance and counselling centre
• C. a computer for every student
• D. a sports ground of at least one acre