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What is acquired traits?
Acquired traits are characteristics or traits that an organism develops during its lifetime as a result of environmental influences or experiences. These traits are not inherited genetically and cannot be passed on to offspring. Examples of acquired traits include language skills, knowledge, and physical changes due to exercise.
Traits that are due to what are considered to be acquired traits?
Acquired traits are those that are developed during an organism's lifetime through environmental influences, experiences, or behaviors, rather than being inherited. Examples include learned skills, habits, or knowledge, as well as physical changes from things like exercise or injuries. Acquired traits are not passed down to offspring through genetic material.
What are Lamarcks's contributions to evolution?
Two pertinent ideas of Lamarck were the idea of acquired characteristics and the concept of use and disuse. Acquired characteristics posited that some experience that an organisms went through in life, such as muscle building due to hard work, would be heritable. Use and disuse posited that certain organs and traits could develop through use, such as the giraffe trying to eat the leaves on the heights of trees, or that organs or traits could be lost through disuse.
What was the problem with lamarcks theory?
Lamarck's theory, known as Lamarckism, proposed that organisms could pass on traits acquired during their lifetime to their offspring, a concept often summarized as "inheritance of acquired characteristics." The main problem with this theory is that it lacks genetic basis; traits that are acquired due to environmental changes or behaviors are not typically encoded in an organism's DNA and thus cannot be inherited. Modern genetics, particularly the understanding of DNA and Mendelian inheritance, has shown that evolution primarily occurs through natural selection acting on heritable genetic variations, not through the inheritance of traits acquired during an organism's lifetime.
What are traits due in part to multiple loci?
POLYGENIC
What is the similarities between sex influenced and sex limited traits?
Both sex-influenced and sex-limited traits are influenced by sex chromosomes. Sex-influenced traits are expressed differently in males and females due to hormonal differences, while sex-limited traits are only expressed in one sex due to anatomical or physiological differences. Both types of traits are dependent on the sex of the individual for their expression.
Do traits vary from person to person?
Yes, traits can vary from person to person due to genetic differences, upbringing, life experiences, and environmental factors. These factors can shape an individual's personality, behavior, and characteristics, leading to differences in traits among people.
What are convergent traits?
Convergent traits are characteristics that have evolved independently in different species to serve a similar function. These traits are not inherited from a common ancestor but have evolved due to similar environmental pressures. An example of convergent traits is the wings of birds and insects, which have evolved independently for flight.
What is the key difference between homology and homoplasy in evolutionary biology?
Homology refers to similarities in traits due to shared ancestry, while homoplasy refers to similarities in traits due to convergent evolution.
What are two sex-linked traits present in humans?
Two sex-linked traits present in humans are color blindness and hemophilia. These traits are carried on the X chromosome and are more commonly expressed in males due to their inheritance pattern.
What are three traits inherited?
Three common inherited traits are eye color, hair texture, and blood type. These traits are determined by genes passed down from parents to offspring. Variations in these traits can be observed within families due to the combination of genetic material from both parents.
How many phenotype are there?
The number of phenotypes is vast and depends on the traits being considered. In general, a phenotype refers to the observable characteristics of an organism, which can include morphology, development, biochemical properties, and behavior. Since these traits can vary widely due to genetic and environmental factors, there is no fixed number of phenotypes; they can be nearly limitless when considering all possible combinations of traits across different species.
