What is a Homologouse structure?

Answer 1

In the diploid cell nucleus there are homologous chromosomes. During meiosis homologous chromosomes pair each other and bring about crossing over to inter change genetic material. This is how new combination of genes are created in the male and female gametes.

Answer 2

Homologous structures are body parts that are alike because the species in question share a common ancestor. These structures may serve the same or different functions. For example, the wing of a bird and the arm of a human serve very different functions, but are considered homologous structures because of the evolutionary relationship between birds and humans. Body parts that are alike in that they serve similar functions (regardless of evolutionary relationship) are analogous structures.

Answer 3

Homologous structures have the EXACT same side chains.

Ex) Are CH3 - CH2 - CH3 and CH3 - CH2 - CH2 - CH3 homologous or not?

These are homologus becasue neither of them have side chains and so there are no side chains to be compared. You don't need to look at the aprent chain itself. Thsoe are considered in Isomers.

Ex) Are CH3 - CH - CH3 and CH3 - CH - CH2 - CH2 - CH3 homologous or not?

' '

Br F

These two ( 2-bromopropane and 2-fluoropentane) are NOT homologous. You don't look at the parent chain itself but look at the side chains. For structures o be homologous, side chains have to be number the same too and so since bromine and fluorine are COMPLETELY different, the side chains are different and therefore this structure is not homologous.

Answer 4

Homologous structures look-alike or work in the same way. A chair leg and a desk leg work in the same way. A dog's leg works like a human leg. All of these structures either look-alike or work like.

Answer 5

A homologous structure is a structure found in two very different animals that has a similar form in both animals. For example, the bones of a human hand are homologous to the bones in a bat's wing or a whale's flipper. Structures that appear very similar suggest that two animal may be related, as in humans, bats, and whales, which are all mammals.

Answer 6

Homologous structures - similar body structures that come from a common ancestor.

Example: Human, cat, whale, and bat limbs.

Answer 7

An orgainism that has multiple purposes through evolution and adaptation. Hope this helps =D

Answer 8

Homologous structures are structures that have similar embryos