In certain breeds of dogs two different sets of alleles determine the color pattern. Black color is dominant and red color is recessive. Solid color is dominant and white spotting is recessive. A homozygous black and white spotted male is crossed with a red female with white spots. What is the probability o them producing a solid black colored puppy?
Mendel, in his study, had analyzed a number of crosses in which two pairs of alternative traits were involved. He proposed the Principle of Independent Assortment, which states that "the factors for different pairs of traits assort independently of one another".
Here, we see that there are two pairs of characters - i) Black (dominant) and Red (recessive).
ii) Solid color (dominant) and White spotting (recessive).
In order to determine the probability of production of a solid black colored puppy, we need to make a Punnett Square.
Homozygous Black, white spotted male : "BBss"
Homozygous Red, white spotted female : "bbss"
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