In horses, there are four alleles at the A locus. Arranged in dominance sequence they are:A
(wild), ab (bay), ac (brown), ad (black)
If you bred several bay mares whose sires were brown to a brown stallion whose sire was black, what
are the genotypes of the parents; what type of offspring would be produced; and in what proportion? What will be an ideal response?
abac ? acad; 1/2 bay, 1/2 brown
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The lipids in the cytoplasmic membrane of Bacteria and ________ contain ester linkages, while the cytoplasmic membrane of ________ contain ether linkages
A) Archaea / Eukarya B) Archaea / fungi C) Eukarya / prokaryotes D) Eukarya / Archaea
About 80% of the alleles present in thoroughbred horses can be dated back to 31 known ancestors from the late eighteenth century. As a result, one would expect _____
A. random mating. B. Hardy-Weinberg equilibrium. C. low rates of mutation. D. many polymorphic alleles. E. little variation in physiology and behavior.
Suppose two living plant cells are in contact with each other so that water, but not solutes, can pass between them. The
cells have the same water potential. One cell has ?P ? 0.3 MPa and ?S = ?0.5 MPa, while the other cell has ?S = ?0.3 MPa. What is the ?P of the second cell?
a. ?P = ?0.8 MPa b. ?P = 0 MPa c. ?P = 0.5 MPa d. ?P = 0.8 MPa e. ?P = 0.1 MPa
Which number identifies a structure that aids in attachment?
a. 1 b. 2 c. 3 d. 7 e. 8