Table of Contents
What is continuous variation in genetics?
Continuous variation is the type of genetic variation showing an unbroken range of phenotypes in a population. Generally, measurable characters such as height, weight, and skin color are classic examples of continuous genetic variation.
What is continuous variation example?
Examples of continuous variation include height, weight, heart rate, finger length, leaf length, etc. Examples of discontinuous variation include tongue rolling, finger prints, eye colour, and blood groups. Continuous variation fluctuates around an average or a mean of species.
What is continuous variation in a trait?
continuous variation An assemblage of measurements of a phenotypic character which form a continuous spectrum of values. Examples are body weight, height, or shape, reproductive rate, and various behaviour traits.
What is the difference between continuous and discontinuous?
Continuous variation is where the different types of variations are distributed on a continuum. On the other hand, discontinuous variation is where the different types of variations are placed into discrete categories.
What causes continuous and discontinuous variation?
Discontinuous variation is controlled by alleles of a single gene or a small number of genes. The environment has little effect on this type of variation. In continuous variation there is a complete range of measurements from one extreme to the other.
Why is there continuous variation?
Two reasons for continuous variation: Mendel had noticed in his original paper in 1865 that multifactorial inheritance (i.e. the character is influenced by many genes) can generate a continuous variation. Characters influenced by many genes are called polygenic characters.
What effects continuous variation?
Continuous variation is the combined effect of many genes (known as polygenic inheritance) and is often significantly affected by environmental influences.
What is continuous and discontinuous in DNA replication?
Continuous DNA synthesis occurs from the 3′ end to the 5′ end of the parent strand. This is often referred to as the leading strand with new nucleotides being added to the 3′ end. Discontinuous DNA synthesis occurs from the 5′ end to the 3′ end of the parent strand.
What is the difference between continuous and discontinuous replication of DNA?
Differentiate between continuous and discontinuous synthesis of DNA….1 Answer.
| Continuous | Discontinuous |
|---|---|
| (a) One stand of DNA is synthesised as a continuous strech in the 5′ —>3′ direction. | (a) Short stretches are synthesised in the 5’—>3′ direction from replication fork |
What factors cause continuous variation?
Genetic and environmental variation combine together to produce different phenotypes . Continuous variation is often caused by a mixture of genes and environment.
What factors affect continuous variation?
Differences in external environmental conditions also produce continuous variation. In nature, each character will be influenced by many environmental variables, some tending to increase it, others to decrease it.
What is continuous variation affected by?
Is hair color continuous variation?
Continuous variations are differences in characteristics that have a range of possible variations, such as height, shoe size, hand span, skin color, hair color, etc. Discrete variations are differences in characteristics that have a definite form, with a limited number of possibilities.
Why is DNA replication called discontinuous?
This happens because during the replication process the whole of the DNA does not unwind once in a single opening. Instead, the DNA unfolds in several segments creating several replication forks. Due to this reason, replication occurs continuously on one strand and discontinuously on the other strand.
Why is DNA replication continuous and discontinuous on the two strands of DNA?
Explanation: In DNA one strand is in 5′ to 3′ direction and another strand is in 3′ to 5′ direction. The DNA polymerase synthesize the new strand in 5′ to 3′ direction so one strand is synthesized continuously and other discontinuously.
What is the reason for continuous and discontinuous replication?
Why Is height a continuous variation?
Height ranges from that of the shortest person in the world to that of the tallest person. Any height is possible between these two extremes. So it is continuous variation. This shape of graph is typical of a feature with continuous variation.
Why does continuous variation occur?
Continuous traits are controlled by more than one genes, each gene has two to several alleles which impart a great degree of variations to the trait. Further, cross over during prophase I of meiosis generates new allelic combinations; thus imparting a wide range of phenotype to the trait.
Is eye color continuous or discontinuous?
Discontinuous
Discontinuous: Eye colour, handedness & lobed/lobeless ears. Continuous: Hand span, arm length & height.
What is continuos variation?
In other words, continuous variation is where the different types of variations are distributed on a continuum, while discontinuous variation is where the different types of variations are placed into discrete, individual categories. Examples of continuous variation include things like a person’s height and weight. Click to see full answer.
What is an example of discontinuous variation?
Time and space complexity analysis.
What is continuous and discontinuous variation?
What is discontinuous and continuous variation? In other words, continuous variation is where the different types of variations are distributed on a continuum, while discontinuous variation is where the different types of variations are placed into discrete, individual categories.
What are the two main types of genetic variation?
Sources of genetic variation|Inheritance and variation|High school biology|Khan Academy