Question

Pietro has two dogs that are related, and he wants to understand why one of the dogs has tan fur and the other has brown fur.

Which pattern of inheritance would explain the different fur color in the related dogs?
polygenic inheritance
codominance
incomplete dominance
quantitative inheritance

Answer 1

Answer: A. polygenic inheritance

Explanation:

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Answer 2

The pattern of inheritance is said to be polygenic inheritance.

• Polygene is a member of a group of non-epistatic genes that contributes to multiple-gene inheritance or polygenic inheritance.

• Genes that are responsible for the color of the fur are melanocortin 1 receptor, tyrosinase-related protein 1, agouti signal peptide, melanophilin, SILV, microphthalmia-associated transcription factor, and beta-defensin 103.

• Since there are almost 7 genes required for one character that is the color of the fur, this process indicates polygenic types of inheritance.