Feather colour in birds is controlled by two genes on separate chromosomes. Blue colour (B) is dominant over the absence of colour (b). Red colour (R) is dominant over the absence of colour (r). When a B allele and an R allele are present, a purple feathered bird is produced. A heterozygous purple bird was crossed with a blue-feathered bird. One white-feathered offspring resulted from the cross. What is the genotype of the blue-feathered bird?    1. Genotypes 2. Punnett Square 3. Explanation

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.