Birth Through Childhood
During which stage of development do children begin to draw recognizable pictures?
early childhood
How many chromosomes do most human cells have?
46
Term for a cluster of cells that develops during the 3rd and 8th week of pregnancy
embryo
Beginning puberty is usually associated with which stage of childhood?
late childhood
Body cells of males have ___ & ___ chromosomes
x and y
The union of a sperm cell and an egg cell
fertilization
What age range is considered middle childhood?
ages 4-6
What is the term for a male gamete?
sperm
Thread-like structures that carry the codes for inherited traits
chromosomes
Imitating new word sounds is one of the developmental tasks in which stage of childhood?
Infancy
The process of inserting normal genes into human cells to correct genetic disorders
amniocentesis
basic units of heredity
genes
Which stage of development does the most rapid growth occur?
Infancy
The test for genetic disorders that uses a layer of tissue that develops into the placenta
chorionic villi sampling
Describe scoliosis
a curvature of the spine