Question

similar behaviors from identical twins who grew up in different homes provide evidence for the influence of
a economic background
b environment
c heredity
d schooling

question 2 (1 point)
if a class of 20 students is equally divided between boys and girls, in how many students would you find y chromosomes?
a 20
b 5
c 0
d 10

question 3 (5 points)

1. in the nature versus nurture debate, nurture refers to ________ factors that impact a persons behavior.
2. the outward expressions of genes, such as hair and eye color, are examples of a persons ________.
3. an extra chromosome in the 21st chromosomal pair results in ________ syndrome.
4. fraternal twins are also called ________ twins.

Explanation:

Question 1

Identical twins share the same genetic material (heredity). When they show similar behaviors despite growing up in different environments (which would be related to economic background, environment, schooling - all aspects of nurture), it provides evidence for the influence of heredity. Economic background, environment, and schooling are more related to external (nurture) factors.

Females have an XX chromosome pair and males have an XY chromosome pair. If a class of 20 students is equally divided between boys and girls, there are 10 boys. Only males have a Y - chromosome.

1. In the nature versus nurture debate, nurture refers to environmental factors (like upbringing, experiences) that impact a person's behavior.
2. The outward expressions of genes (such as hair and eye color) are examples of a person's phenotype.
3. An extra chromosome in the 21st chromosomal pair results in Down syndrome.
4. Fraternal twins are also called dizygotic twins (they come from two separate eggs fertilized by two separate sperm).

Answer:

c. heredity

Question 2