Red-green color blindness is due to an x-linked recessive allele in humans. a widow�s peak (a hairline that comes to a peak in the middle of the forehead) is due to an autosomal dominant allele.
consider the following family history:
a man with a widow�s peak and normal color vision marries a color-blind woman with a straight hairline.
the man�s father had a straight hairline, as did both of the woman�s parents.
use the family history to make predictions about the couple�s children.
drag the correct label to the appropriate location in the table. not all labels will be used.
what is the chance that any daughter the couple has will be color blind with a straight hairline?
drag answer here
what is the chance that any son that the couple has will be color blind with a widow's peak?
drag answer here
if the couple has a child, what is the chance that it will be a daughter with a widow's peak?
drag answer here
suppose the couple had a daughter with normal color vision and a widow's peak. what is the chance that she is homozygous for both genes?
drag answer here
0
1/2
3/4
1
1/4

Based on the exercise data we know that the couple genotype for red-green color blindness is:

(XY     x     X'X')

     X'        X'

X    X'X      X'X

Y   X'Y      X'Y

And the genotypes for widow's peak are:

  (Aa   x  aa)

     a      a

A   Aa   Aa

a    aa    aa

1) What is the chance that any daughter the couple has will be color blind with a straight hairline?

Zero

2) What is the chance that any son that the couple has will be color blind with a widow's peak?

1/4

3) If the couple has a child, what is the chance that it will be a daughter with a widow's peak?

1/4

4) Suppose the couple had a daughter with normal color vision and a widow's peak. What is the chance that she is homozygous for both genes?

Zero

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

which fault and or fold did you find most difficult to diagram