In humans, normal skin pigmentation is influenced by a dominant gene (C), which allows
pigmentation to develop. All individuals who are homozygous for the recessive allele (c) are unable to
produce an enzyme needed for melanin formation and are therefore referred to as albino. Two normal
parents produce an albino child. What are the chances that the next child will be an albino? What will be an ideal response?
/4 chance
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A symbiont could be a(n):
A) commensal. B) opportunist. C) parasite. D) all of the above
In this diagram showing fertilization of a flowering plant, which structure is the egg?
1.A
2.B
3.C
4.D
One of the main obstacles to successful cloning of sheep apparently overcome by Wilmut et al. was:a
finding an adult nucleus that was likely to work. b. synchronizing the cell cycles of the donor cell and the egg cell. c. enucleating the donor cell. d. the ability to culture cells in the laboratory. e. recognizing that the nucleus from one sheep cell may contain different genetic information than the nucleus of another cell from the same animal
How do the various membranes of a cell differ?
a. Only certain membranes are constructed of a selectively permeable membrane. b. Certain proteins are unique to each membrane. c. Phospholipids are found only in certain membranes. d. Only certain membranes are constructed from molecules with dual solubility.