1. Answers to “A Closer Look at Conception”
Characteristics that you inherit…..
1. physical build
2. skin color
3. hair texture and color
4. eye color and shape
5. size, shape of ears, hands, feet
6. blood type

2. …..receives a total of 46 tiny threadlike particles called chromosomes
23 chromosomes come from the father or sperm
23 chromosomes come from the mother or egg
4. Each chromosomes contains thousands of genes.

3. What determines? Genes
Each individual receives 2 copies
1 from the mother; 1 from the father
When both are the same…..
Dominant or stronger gene…..
Weaker gene is known as recessive
8. The sex of the child is determined at conception.

4. Half of the father’s sperm have the X chromosome and the other half have the Y chromosome.
The mother’s egg has the “X” chromosome.
X+X=XX or a girl; X+Y=XY or a boy
11. If a family has 3 girls what are the chances????? /50

5. Type:
# of sperm
# of eggs
Identical
Fraternal
Conjoined

6. Infertility Options: They stimulate a woman’s ovaries to release eggs.
Adoption: legally take the responsibility of raising a child already born
Artificial Insemination-doctor injects sperm into a woman’s uterus with a special needle.
15. In Vitro Fertilization-woman has damaged Fallopian tubes that prevent pregnancy---doctor combines a mature egg from the woman and the sperm from her husband in a small dish—if fertilization occurs, doctor places the zygote into the woman’s uterus.

7. Ovum transfer—uses egg taken from a female donor and uses in vitro fertilization
Surrogate mother----a substitute---has a baby for the couple…includes legal arrangements or meet state laws.