Question

6. Explain the terms analogous and homologous organs with examples.
7. Outline a project which aims to find the dominant coat colour in dogs.​

Answer 1

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Homologous organs are those organs which have the same basic structural design and origin but have different functions.

Analogous organs are those organs which have different basic structural design and origin but have similar functions.

For example, The wings of birds and insects.

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A variety of genes are responsible for the coat colour in dogs. At least 11 genes have been identified that influence the colour of coat in a dog. A dominant gene is a gene that is expressed in both homozygous and heterozygous conditions, whereas a recessive gene is only expressed in a homozygous condition. Let us consider, one parent is homozygous black (BB) and another parent is homozygous brown (bb).

• Cross between the two parent produces the offspring with the genetic make-up: Bb
• Now we don’t know whether Black is dominant or brown is dominant
• By observing the off-springs produced are we can say which one is a dominant trait.
• If the F1 generation comprises black we can say black is dominant and if it is brown then we can say brown is dominant.

Hope it helps!!

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Answer 2

Mark my bestie @itzmralcohol's Answer as Brainliest :D