In general, offspring of bam swallows have tail lengths very similar to their parents. However, if the offspring are removed from their nests while young and transplanted to nests that have parents of significantly different tail lengths, these birds tend to grow tail lengths similar to their "foster" parent types. What explains this result? 1.Tail length in barn swallows appears to be influenced by both genes and the environment. 2.Tail length in barn swallows follows a genetic pattern of incomplete dominance. 3.Tail length is a phenotypic trait that follows patterns of Mendelian inheritance. 4.Tail length is not influenced by genotype in barn swallows.

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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.