Answer to Question 1
C
Sickle cell disease is an autosomal recessive disorder requiring both parents to contribute to the outcome. An ultrasound will not diagnose sickle cell disease in the fetus. Amniocentesis is an invasive procedure, but it is not appropriate for diagnosing sickle cell disease.
Answer to Question 2
2
Rationale:
1. A binuclear family includes the divorced parents, who have joint custody of their biologic children, who alternate spending varying amounts of time in the home of each parent.
2. An extended family contains a parent or a couple who share the house with their children and another adult relative.
3. A gay or lesbian family is composed of two same-sex domestic partners; they might or might not have children.
4. The traditional nuclear family consists of an employed provider parent, a homemaking parent, and the biologic children of this union.
Schematic of typical plant cell
No recombinants are produced without cell contact
Stroke Risk Factors
Fetus Growing
In F- F+ mating, demonstrating how the recipient F- cell is converted to F+
Stabilizing selection eliminates extreme forms of a trait