| Early Stages of Development | Mom | Influence on development | Birth Defects | General |
|---|---|---|---|---|
|
What happens during conception?
Ovum and sperm unite
|
What is the first trimester?
Morning sickness begins.
|
What is an environmental influence?
Stacy was born prematurely and was low birthweight because her mother smoked during pregnancy.
|
What is a defective recessive gene from both parents?
Sickle cell anemia
|
What are fraternal twins?
2 sperm unite with 2 eggs at the same time and make 2 zygotes.
|
|
What is the size of the zygote during the first month of pregnancy?
Pinhead
|
What is the third trimester?
Leg cramps, shortness of breath and strong kicks from fetus occur now.
|
What is a hereditary inflluence?
Genes received from the mother that causes the infant to have hemophilia.
|
What happens when a pregnant mom consumes harmful substances?
Fetal Alcohol syndrome
|
What makes a Boy?
Y Chromosome
|
|
What is the first trimester
Face, eyes, ears, and limbs develop
|
What is the first trimester?
Gain of 2-4 pounds is expected.
|
What is an environmental influence?
Infant is diagnosed with cancer because the mother had x-rays during pregnancy.
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What happens when an infant receives defective recessive genes from both parents?
Tay-sachs disease
|
What causes mental disabilities?
Lead paint or other strong chemicals
|
|
What is the second trimester
Fetus begins to suck its thumb
|
What is the third trimester?
False labor pains may be experienced.
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What is an environmental influence?
A child develops toxoplasmosis because mom was exposed to cats during her pregnancy,
|
What is the presence of an extra chromosome 21?
Down Syndrome
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What is the eigth month of pregnancy?
Fetus reacts to loud noises.
|
|
What is the 4th month or second trimester?
Fetus is 3 inches long.
|
What is the recommended weight gain during pregnancy?
25-35 lbs.
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What is a hereditary influence?
Mike has Tay-Sachs disease.
|
What is an example of a birth defect resulting from hereditary and environmental influences?
Mary has an incomplete spinal cord and an inherited gene.
|
What is the second trimester?
Fetus grows hair, eyelashes, and eyebrows.
|
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