Antennaless (al), brown eyes (bw), and ebony body (e) are recessive autosomal mutants of Drosophila melanogaster. A female that was heterozygous for all three traits was test-crossed to a male expressing antennaless, brown, and ebony to produce the following progeny (Total = 1,000): al bw e al + e 18 232 ++ e al bw + 21 17 +bw e al + + 229 237 Which of the following shows the correct orientation of genes in the F1 female? +++ + bw + 16 230

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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.