Edith and her pal Dave love to catch butterflies in the nearby fields! The fields are home to a special type of green butterfly known as “Goobers” and only really great butterfly catchers are lucky enough to catch some on every trip. Many of the butterflies are yellow (RR) or blue (BB), but some end up with yellow and blue spots as a result of co-dominance (RB). Edith and Dave can only catch 1 yellow and 1 blue butterfly but really want a goober. They decide to mate the two butterflies they caught. What is the probability of them getting a "goober" butterfly?

The probability of obtaining a "goober" butterfly is 6.25%

Explanation

If there are three possible combinations of butterflies, with yellow and blue being dominant, green is supposed to contain a recessive pattern, so according to Mendel's law of character independence, the pattern RR and BB manifest the dominant phenotype yellow, blue or yellow and blue in spots, the green pattern must be recessive is represented by the letter a, the punnett graph is made, obtaining that 56% present a dominant pattern, 37.5% will be spotted and the pattern recessive must match to generate 6.25% of butterflies “goober”.

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