Exam 2: Biological Beginnings

During fertilization,an egg and a sperm fuse to create a single cell called a _____.

Identify a risk related to the use of chorionic villus sampling (CVS)as a prenatal diagnostic test.

David and Kelly are seeking help for infertility.Under their physician's guidance,they decide to undergo a procedure in which Kelly's eggs are combined in a laboratory dish with her husband's sperms.What is this procedure called?

Which of the following statements about the activity of genes is TRUE?

Melody and Harmony are identical twins.This means that they developed from:

Gwendolyn is having a prenatal test where her doctor uses high-frequency sound waves directed into her abdomen to check her fetus.She is most likely having a(n):

Xiomarra is tall with dark curly hair and brown eyes.She is outgoing and friendly.Name these observable characteristics of her genetic makeup.

_____ develop from a single zygote that splits into two genetically matching replicas,each of which becomes a person.

_____ is the interaction of a specific measured variation in the DNA and a specific measured aspect of the environment.

List three possible causes of infertility in women and in men.What are the two strategies that can be used to overcome infertility?

What are some problems adopted children face at different points of development (infancy,early childhood,middle and late childhood,and adolescence)?

List four sex-linked chromosomal abnormalities.

During the process of _____,the cell's nucleus-including the chromosomes-duplicates itself and the cell divides resulting in the formation of two cells.

_____ genes are those that make the individual more vulnerable to specific diseases or acceleration of aging.

Which of the following statements regarding chorionic villus sampling (CVS)and amniocentesis is true?

What are gametes?

Sasha's 23rd chromosome pair contains two X chromosomes.This indicates that Sasha:

Parents often interact differently with each sibling,and siblings interact differently with parents.Even these experiences occurring within the family can be part of the _____ of siblings.

Mary and Jim are expecting a child and prenatal diagnostic procedures have confirmed that the fetus has _____,a neural tube disorder that causes brain and spine abnormalities.Their physician has explained that this gene-linked abnormality could be treated with corrective surgery at birth,orthopedic devices,and physical or medical therapy.

What are the three ways that heredity and environment are correlated as described by behavior geneticist Sandra Scarr.