Hybrid black Guinea pigs are crossed with each other. The resulting offsprings will be:
Correct answer: C. 3 black, 1 white
- A. All black
- B. All white
- C. 3 black, 1 white
- D. 3 white, 1 black
Explanation
Hybrid black Guinea pigs have the genotype Bb, where B (black) is dominant and b (white) is recessive. When two Bb individuals are crossed, the Punnett square results in the following combinations:BB (Black) - 1/4 (25%)Bb (Black) - 1/2 (50%)bb (White) - 1/4 (25%)Thus, out of four offspring, three will be black (BB or Bb), and one will be white (bb).
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Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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