You have recently purchased a black angus bull named Maxwell, an advertised "pure-breeding" champion, for which you pay $1,000,000. You mate Max with several cows that are verified pure breeding black angus cows. Several years later, you mate different pairs of Max's offspring (F1 × F1) and find that, with certain pairings, approximately one fourth of the progeny are red (F2). If B = black and b

= red, what were the genotypes of the original cross (Maxwell × cow)?

A) BB x BB
B) Bb x BB
C) Bb x Bb
D) BB x bb
E) bb x bb


B) Bb x BB

Biology & Microbiology

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