which are homologous features course hero

What is a homologous feature?

“Homologous Features are similar structures which result from common ancestry.” “Hang on,” said Carl, swiping through his personal computation device. “I have a quote about this subject in here. Listen:

Can We prove the existence of homologous features is evidence for evolution?

But if the evolutionary story has to be established before we can tell if similar features are even homologous, then we can’t say the existence of homologous features are evidence for evolution, can we?” “What?” Carl stammered. “Of course we can! No, listen.

What do homologous pairs have in common?

Also, notice that the homologous pairs are the same size and have the identical banding pattern. Geneticists use these bands to identify the location of the genes on the chromosome. Developmental biology refers to homologous organs in the males and females of a species.

What is a homologous chromosome?

Homologous chromosomes refer to a pair of chromosomes that have genes for the same traits at corresponding chromosomal locations. One member of the pair is maternal and one is paternal. This uses homologous in the sense of having a similar position and function.

Which anatomical features are homologous?

Homologous Structures Humans Share With AnimalsA dolphin's flipper, a bird's wing, a cat's leg, and a human arm are considered homologous structures. ... The tailbone in human beings is so-named because it is a homologous structure to the beginning of many animals' tails, such as monkeys.More items...

What is the difference between homologous and analogous traits How does your trait of choice fit either of these descriptions?

Homologous structures share a similar embryonic origin; analogous organs have a similar function. For example, the bones in the front flipper of a whale are homologous to the bones in the human arm. These structures are not analogous. The wings of a butterfly and the wings of a bird are analogous but not homologous.

What can shared anatomical structures indicate?

Some organisms have anatomical structures that are very similar in embryological development and form, but very different in function. These are called homologous structures. Since these structures are so similar, they indicate an evolutionary relationship and a common ancestor of the species that possess them.

What are structural homologies?

Homologous structures are similar physical features in organisms that share a common ancestor, but the features serve completely different functions. An example of homologous structures are the limbs of humans, cats, whales, and bats.

What are homologous traits?

Homologous traits are those traits that are shared by two or more different species that share a common ancestor. These traits are similar in structure or genetics, but may have very different functions and appearances.

Which are examples of homologous structures?

A common example of homologous structures in evolutionary biology are the wings of bats and the arms of primates. Although these two structures do not look similar or have the same function, genetically, they come from the same structure of the last common ancestor.

How do you identify a homologous structure?

0:121:53Homologous Structures vs Analogous Structures | Key DifferencesYouTubeStart of suggested clipEnd of suggested clipSo homologous structures have a similar structure meaning they're anatomy or the bone structure isMoreSo homologous structures have a similar structure meaning they're anatomy or the bone structure is similar. They have a differing function so a wing versus an arm versus a fin for example.

Which of the following are the best examples of homologous structures?

A great example of homologous structures are the wings of a bat and the arms of a human. Bats and humans are both mammals, so they share a common ancestry. Both a bat's wing and a human's arm share a similar internal bone structure, even though they look very different externally.

What are homologous and analogous structures?

Structures with similar anatomy, morphology, embryology and genetics but dissimilar functions are known as homologous structures. Structures that are superficially similar but anatomical dissimilar doing the same function are known as analogous structures.

Which of the following are examples of homologous features?

Following are some examples of homology: The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale are homologous structures. They are different and have a different purpose, but they are similar and share common traits.

What is homologous give example?

Homologous structure- are basic body structures of animals having similar structure but different function. Eg:- Arm of Human, wing of bat, and front leg of horse all of them have similar basic structures but entirely different functions. Yes, It is necessary that homologous structures always have a common ancestor.

What are three types of homologies?

The three types of homology are molecular, developmental, and structural homology.

Why is homologous a term?

However, that definition is still somewhat broad and ambiguous. The reason for this is because the term 'homologous' is used in several different fashions in biology. The individual definitions are more specific, but they are all derived from the idea of 'having the same relation.'.

What is homologous structure?

Homologous Structures. A homologous structure is an organ, system, or body part that shares a common ancestry in multiple organisms. This definition is found in evolutionary biology and uses the meaning of having a similar structure or origin.

What is homologous in sexual differentiation?

In terms of sexual differentiation, organs are considered homologous if they develop from the same embryonic tissue. For example, the ovaries and testes both develop from the embryonic gonad. This term uses homologous in the sense of having a similar origin. Lesson Summary.

What is a pair of chromosomes that have genes for the same traits at corresponding chromos

Homologous chromosomes. a pair of chromosomes that have genes for the same traits at corresponding chromosomal locations. Karyotype. the visual layout of all of the chromosomes in the nuclei of a person's cell. Homologous organs.

Why do geneticists use homologous bands?

Geneticists use these bands to identify the location of the genes on the chromosome. Homologous Organs. Developmental biology refers to homologous organs in the males and females of a species.

What does the prefix "homo" mean?

Words with the prefix 'homo' all have the idea of sameness in their meaning. We will be continuing with this etymology as we discuss the various definitions of 'homologous' that are found in biology. The term homologous comes from the Greek 'homos' meaning same and 'logos' meaning relation.

What is a homophone?

A homophone is a word that sounds the same as another but has a different meaning. If a group is homogenous, all of its members are uniform or consistent. A homosexual is a person sexually attracted to a member of the same sex.