A Recessive Gene Can Only Assert Itself When

Question: The theory of evolution by way of natural selection was put forth by:

a) Sigmund Freud.

b) Charles Darwin.

c) Stephen Hawking.

d) Wilhelm Wundt.

Answer: b) Charles Darwin.

Question: When characteristics of an infant’s temperament encourage responses in the people around them, this is called evocative genotype-environment correlations.

True or False

Answer: True

Question: A chromosome is the smallest structure of hereditary information.

True or False

Answer: False

Question: Klinefelter syndrome, in which an individual possesses an XXY chromosomal pattern, affects:

a) males only.

b) females only.

c) both males and females equally.

d) more females than males.

Answer: a) males only.

Question: This is a prenatal medical procedure where a sample of amniotic fluid is withdrawn by syringe and tested for chromosome or metabolic disorders.

a) chronic villi sampling

b) triple screen

c) amniocentesis

d) ultrasound sonography

Answer: c) amniocentesis

Question: Down Syndrome is caused when there is an extra copy of the 21st chromosome, bringing the total to 47 chromosomes.

True or False

Answer: True

Question: Pat’s 23rd chromosome pair contains an X chromosome and a Y chromosome. This indicates that Pat:

a) has Down syndrome.

b) is male.

c) likely had a mother who used drugs and/or alcohol during her pregnancy.

d) may develop PKU if his/her diet is not carefully monitored.

Answer: b) is male.

Question: A ________ consists of observable characteristics, physical traits that appear in an individual as a result of its genetic make up.

a) genotype

b) themotype

c) phenotype

d) menotype

Answer: c) phenotype

Question: The chorionic villus sampling involves removing a small piece of the placenta for genetic testing.

True or False

Answer: True

Question: Once the egg has been fertilized it is referred to as a…

a) phenotype

b) gamete

c) maptosis

d) zygote

Answer: d) zygote