Centuries: 9th century - 10th century - 11th century
Decades: 930s 940s 950s 960s 970s - 980s - 990s 1000s 1010s 1020s 1030s
Years: 980 981 982 983 984 - 985 - 986 987 988 989 990
... chromosome that is the same in both sexes of a species. For example, in humans, there are 22 pairs of autosomes. The X and Y chromosomes are ...
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