In sparrows: • brown feathers are dominant (B) and dun feathers are recessive (b) • yellow beaks are dominant (Y) and orange beaks are recessive (y) You have a brown-feathered, yellow-beaked sparrow of unknown genotype, and conduct a testcross. What phenotypic ratio would you expect to see as a result of the cross if your unknown individual was BBYY? (In the answers, feather color is given first, then beak color.) O 1 dun,yellow : 1 dun,orange 1 brown,yellow : 1 dun,yellow O 3 brown,yellow :1 dun,yellow

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A:

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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.