THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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common behaviors
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similar physical features
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DNA or protein sequences of shared genes.
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fossilized ancestors that they may have in common.
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Detailed explanation-1: -Biologists often compare the sequences of related genes found in different species (often called homologous or orthologous genes) to figure out how those species are evolutionarily related to one another.
Detailed explanation-2: -Presently, the most accepted method for constructing phylogenetic trees is a method called cladistics. This method sorts organisms into clades, groups of organisms that are most closely related to each other and the ancestor from which they descended.
Detailed explanation-3: -Only homologous traits are considered in establishing evolutionary relationships, because they are evidence of evolutionary change. Closely related organisms will share homologous traits, whereas analogous traits are often shared by only distantly related organisms.
Detailed explanation-4: -The appropriate indicator of relatedness is the age of two organisms’ most recent common ancestor. Organisms that share a more recent common ancestor are more closely related than organisms with a most recent common ancestor that is older.