-.. -.-..-..-
4. An individual that is a sickle cell carrier has a child with an individual who does not carry
the sickle cell allele or have anemia.
A. What are the genotypes of the parents? (Use HbA and HbS alleles)
B. What are the chances the child will have sickle cell anemia (the disease)?
C. This couple has a child that is a sickle cell carrier. If this couple moves to a coastal
area of East Africa where malaria is prevalent with their child, which of the family
members will need to take an anti-malaria medication? Why?

the answer is b: 1.4 km/hr

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .