Chapter 2 - The Start of Life Flashcards
Gametes come together to form
Zygotes
How many pairs of chromosomes are there in genetic code at conception?
23
When does life begin?
Conception
A phenotype is expressed by
Only by one’s appearance
A trait that is not expressed (displayed) is known as a
Recessive Trait
A blood disorder named for the shape of the red blood cells and found in African Americans is
Sickle-cell Anemia
Counseling that focuses on helping people deal with issues relating to inherited disorders is called
Genetic Counseling
When a small sample of fetal cells is drawn by a tiny needle inserted into the amniotic fluid surrounding the unborn fetus is known as
Amniocentesis
Patterns of arousal and emotionally that represent consistent and enduring characteristics in an individual are known as
Temperament
Monozygotic twins are
Identical
The joining of sperm and ovum to create the single-celled zygote from which all of us began our lives is known as
Fertilization
How long does the germinal stage last?
2 weeks
At what point does the unborn child become a fetus?
8 weeks
An environmental agent such as a drug, chemical, virus, or other factor that produces a birth defect is known as
Teratogen
Nature
Anything we get from our genetic code
Nurture
Anything that we learn from our environment
