Breeding rabbits-- determine the relative positions of these three genes and the rfs between the first and second gene, and between the second and third gene.

h+ rightarrow one (dom), h rightarrow two heads (rec) e+ rightarrow long ears (dom), e rightarrow short ears (rec)
c+ rightarrow black (dom), c rightarrow white (rec)

cross e+ h c+ x e h c rightarrow 1000 offspring
e h+ c e h c
(gene order is drawn arbitrarily, and is unknown)
260 black, two-headed, long eared
280 white, one-headed, short eared
16 white, two-headed, long eared
14 black, one-headed, short eared
70 white, one-headed, long eared
80 black, two-headed, short eared
130 black, one-headed, long eared
150 white, two-headed, short eared

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unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.