Afamily has two male children one brother has a crooked thumb and the other one does not what causes the difference

how did computers function before microprocessors

each child revives 23 chromosomes from the mother and 23 from the father often siblings don't look alike because they inherited looks from both parents or maybe just one

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."