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Explain why the offspring of a cactus finch and a medium ground finch would look like an intermediate between the two birds, but the song would not be an intermediate.

Respuesta :

hihirasohail

Answer:

See below

Explanation:

How the finch offspring "looks" is determined by the genes it inherits (nature) whereas the offspring will be able to learn the song from their parent (nurture). In this case, it is the male parent that teaches the song to their young. Hence, the song that the finch offspring learns is from the male finch parent which is why it remains the same as before.

marianaegarciaperedo

The finch's beak size is genetically controlled and depends on genes interaction -inheritance-. Finches' songs are a learned behavior and depend on the other individuals and the habitat -nurture-.

Finches' beak morphology

  • Natural selection is responsible for the change in the finches' beaks size and shape.

  • The morphology of the finch's beak has been changing through history, making the animals be better adapted to feed on different food sources and avoid competition.

  • Many genes are involved in determining the morphology of beaks. ALX1 and HMGA2 genes control the shape and size of the beak, respectively. They act regulating the expression of other genes.

  • So, according to how genes interact, finches express different sizes of beaks.

  • The offspring of a cactus finch and a medium finch show the intermediate phenotype of their beaks because of gene interaction.

  • The intermediate phenotype of the offspring is due to inheritance patterns and might be related to incomplete dominance.

Finches' Songs

  • Finches recognize individuals of the same species by their songs and morphology.

  • These birds learn how to sing from other individuals while they are young.

  • So, according to which adult individuals are near them, young finches will learn different songs, independently of their beak size.

  • This is about learned behavior. It depends on the habitat characteristics and the interaction with other individuals in the population.

So, the finch's beak size is genetically controlled and depends on genes interaction -inheritance-. Finches' songs are a learned behavior and depend on the other individuals and the habitat -nurture-.

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You will learn more about learned behavior and genetic control at

https://brainly.com/question/938178

https://brainly.com/question/25301436

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