Chapter 3 - part 7: Heredity and Behaviour: Is It All in the Genes?

What do we call the interdisciplinary field that studies the influence of inherited traits on complex behaviour?

Which of the following is true of genes but not chromosomes?

What is the genetic complement of all cells in the human body, except sex cells?

How many chromosomes does a zygote contain?

How many possible combinations of chromosomes are possible when you combine one person’s sperm with another person’s egg?

What do we call a pairing of genes with one dominant and one recessive gene?

What do we call the member of a gene pair that is more influential in terms of expressing a trait?

Assume that developing a sixth toe is a recessive trait that is controlled by a single pair of genes. If a child has six toes, but both the child’s parents have normal feet, what can you conclude?

What is the term for the specific pattern of genes that an individual inherits at conception?

What is a person’s genotype?

Which of the following is determined at conception and is essentially fixed forever?

Shane and Blane are monozygotic twins. However, people seldom get the two brothers mixed up because Blane is almost two inches shorter than Shane. What can you conclude based on this evidence?

If a trait is described as polygenic, what does that mean?

Skin colour is determined by three to five gene pairs. Based on this information, what type of trait is skin colour?

Why are all human studies about the interaction of genes and environment correlational?

Which two individuals would we expect to have the GREATEST degree of phenotypic similarity?

Four sisters were all raised in the same household by parents who are very creative and artistic. Anna and Betty are the biological children of their parents, while Cassie and Deanna were adopted as infants into the family. Like their parents, Anna and Betty are artistically inclined and enjoy working on creative projects. Cassie and Deanna are not particularly interested in artistic endeavours even though they’ve received a lot of exposure to art and a lot of encouragement for creative work. Which of the following conclusions would be reasonable if this pattern occurred in a variety of similar families?

Which of the following supports the hypothesis that intelligence is influenced by environmental factors?

Londra and Sondra are identical twins who have been raised together in the same home. Londra has developed a psychological disorder, but Sondra does not appear to have the same disorder. What does this suggest about the disorder if this pattern holds for other identical twins?

Phong and Phan are identical twins who have been raised apart in separate adoptive homes. However, both brothers have developed the same psychological disorder. What does this evidence suggest?

Mary and Celine are identical twins who have been raised apart in separate adoptive homes. Mary has developed a psychological disorder, but Celine does not appear to have the same disorder. What does this evidence suggest?

What can we conclude about the heritability of intelligence, based on adoption studies?

Which of the following comparison groups has a significant similarity with adopted children, based on research on adopted children and intelligence?

Donavon was adopted at birth by Mr. and Mrs. Erndt. Although neither of his biological parents had much musical ability, Donavon has become an excellent pianist, just like Mr. Erndt. What would this evidence suggest if this pattern held up across multiple adoption studies?

If you are working on the Human Genome Project, which of the following types of traits are you most likely to be able to map?

What do we know about the heritability of schizophrenia?

Dean is conducting a study in which he exposes rats to different amounts of noise to cause different amounts of stress. He then evaluates whether the offspring of those rats have different reactions to stress. What sort of study is Dean conducting?