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Why phenotype are more common in a population than others?
Fitness.
Are dominant phenotypes more common?
No. If you think of some of the dominant human phenotypes, you'll notice they are uncommon (or even very rare). Examples are sexydactyly (six fingers/toes), Huntington's chorea, photic sneezing, widow's peak, cheek dimples, cleft chin, and achondroplasia (the most common form of dwarfism). The reason is because the dominant alleles that cause these phenotypes are uncommon in our gene pool.
Why isn't it possible to have more genotypes than phenotypes?
I think you have the question backwards, "Why isn't it possible to have more phenotypes than genotypes?" There are always more or an equal number of genotypes relative to phenotypes. The phenotype for a simple dominant/recessive interaction (for example) T for tall and t for short where TT is tall, Tt is tall and tt is short has three genotypes and two phenotypes. If T and t are co-dominant then TT would be tall, Tt would be intermediate and tt would be short. (Three phenotypes and three genotypes.)
What is polymerism gene effect?
Polymorphism gene effect occurs when two or more clearly different phenotypes exist in the same population of a species. In order for this to occur, morphs must occupy the same habitat at the same time and belong to a population with random mating.
Why do you have more genotypes than phenotypes?
Because those alleles segregate, or seperate, and combine again to make different alleles, thus making different phenotypes.
Why some phenotypes are more common in a population than others?
Fitness.
Why phenotype are more common in a population than others?
Fitness.
How many warblers are left in the world?
There are many species, some more common than others. The total warbler population has to be in the millions.
Which religion is more population in India?
Hinduism. There are many types of religion in India. Islam and Christianity are the others. Hinduism is the most common.
What are the 3 ways natural selection can affect a population?
Directional selection: favors the phenotype at one extreme of a trait's range, selecting against the opposite extreme.Stabilizing selection: favors the intermediate phenotype, selecting against the phenotypes at both extremes of the trait's range.Disruptive selection: favors phenotypes at both extremes, selecting against the intermediate phenotype of the trait's range.
Are dominant phenotypes more common?
No. If you think of some of the dominant human phenotypes, you'll notice they are uncommon (or even very rare). Examples are sexydactyly (six fingers/toes), Huntington's chorea, photic sneezing, widow's peak, cheek dimples, cleft chin, and achondroplasia (the most common form of dwarfism). The reason is because the dominant alleles that cause these phenotypes are uncommon in our gene pool.
Why isn't it possible to have more genotypes than phenotypes?
I think you have the question backwards, "Why isn't it possible to have more phenotypes than genotypes?" There are always more or an equal number of genotypes relative to phenotypes. The phenotype for a simple dominant/recessive interaction (for example) T for tall and t for short where TT is tall, Tt is tall and tt is short has three genotypes and two phenotypes. If T and t are co-dominant then TT would be tall, Tt would be intermediate and tt would be short. (Three phenotypes and three genotypes.)
Which genotypes have dominant phenotypes?
The genotypes in which one or more alleles is dominant.
What is polymerism gene effect?
Polymorphism gene effect occurs when two or more clearly different phenotypes exist in the same population of a species. In order for this to occur, morphs must occupy the same habitat at the same time and belong to a population with random mating.
Why do you have more genotypes than phenotypes?
Because those alleles segregate, or seperate, and combine again to make different alleles, thus making different phenotypes.
What percentage of the US has freckles?
Approximately 5-10% of the population in the US has freckles. Freckles are more common in individuals with fair skin and red hair.
More phenotypes than expected may result from polygenic inheritance because of what?
pleiotropy
