Answer:
Black hair
Explanation:
(In most cases) A child from red+black haired parents would have black hair. The allele for black hair is dominant to that of red, and would be the phenotype of the hair.
Are there multiple choices ?
Weeks 3-4: three layers form: the
ectoderm, the mesoderm, and the endoderm. Neural tube develops and produces
neurons. Heart begins beating. Ribs, muscles, and digestive tract form. weeks
5-8: arms and legs develop, then fingers and toes; placenta and umbilical cord
function; digestive system develops; liver produces blood cells.
Measuring the fur thinckness, because that's what you're looking for.