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Why does natural selection only work on phenotypes?
Natural selection is based on the environment and on the traits of organisms. Organisms with more suitable traits are more likely to survive until reproductive age, while organisms with less suitable traits are more likely to die before they can reproduce. Most of these traits are genetic traits. The phenotype is the set of all genetic traits. Natural selection is not determined by genotypes, because genotypes are merely an organism's genetic makeup. Only the dominant or somewhat dominant alleles in the genotype will also appear in the phenotype. However, genotypes still contribute to natural selection indirectly in that two alleles in two parents' genotypes which had not appeared in their phenotypes could be inherited such that they are in the phenotype of the offspring.
Dominant and recessive traits?
A dominant trait is a genetic trait which may cause a hereditary condition, a recessive trait disappears or goes in the background and only shows in a few generations.
Comapre and contrast dominant and recessive traits?
Dominant traits only require one allele to be present in order for the trait to be expressed, while recessive traits must have both alleles present in order for the trait to be expressed.
What is the only way a recessive trait will be expressed?
Breed/use only organisms showing the recessive trait for starters. If one of the parents or progenitor lines show the dominant trait then don't use their offspring. If the offspring of one of the oranisims show the dominant trait then remove both the parent of this offspring and this offspring showing the dominant trait from your program.
Do all versions of each gene always get expressed in an organism?
No, only dominant traits will be expressed.
Why does natural selection only work on phenotypes?
Natural selection is based on the environment and on the traits of organisms. Organisms with more suitable traits are more likely to survive until reproductive age, while organisms with less suitable traits are more likely to die before they can reproduce. Most of these traits are genetic traits. The phenotype is the set of all genetic traits. Natural selection is not determined by genotypes, because genotypes are merely an organism's genetic makeup. Only the dominant or somewhat dominant alleles in the genotype will also appear in the phenotype. However, genotypes still contribute to natural selection indirectly in that two alleles in two parents' genotypes which had not appeared in their phenotypes could be inherited such that they are in the phenotype of the offspring.
Dominant and recessive traits?
A dominant trait is a genetic trait which may cause a hereditary condition, a recessive trait disappears or goes in the background and only shows in a few generations.
State Mendel's principle of dominance?
Only the dominant trait can be seen in an organism that is hybrid for a pair of contrasting traits
Comapre and contrast dominant and recessive traits?
Dominant traits only require one allele to be present in order for the trait to be expressed, while recessive traits must have both alleles present in order for the trait to be expressed.
Are curly ears a dominant or recessive traits?
its a dominant trait because it covers up your recessive trait so only dominant shows :)
What is the only way a recessive trait will be expressed?
Breed/use only organisms showing the recessive trait for starters. If one of the parents or progenitor lines show the dominant trait then don't use their offspring. If the offspring of one of the oranisims show the dominant trait then remove both the parent of this offspring and this offspring showing the dominant trait from your program.
If a pattern of inheritance for a trait is complete dominance then an organism heterozygous for the trait would normally express?
If a trait is dominant, then an organisms heterozygous (hybrid) for that trait would normally show: A) The recessive trait only B) The dominant trait only C) A blend of the recessive and dominant traits D) A phenotype unlike that of either parent B) The dominant trait only! Reason being because heterozygous means the pair of genes are different. When this occurs, only the dominant trait is expressed.
How are dominant and recessive genes related?
Dominate them. Recessive alleles do not show in your phenotype unless you have two of the same recessive allele. But if you inherit one dominant and one recessive, it is the dominant that always shows in your phenotype.
What are homologous traits?
Homologous traits are traits that are determined by a common ancestor. These are similar traits between multiple organisms. For example, hand of a human and the hand of a monkey have similar functions so they would be considered homologous traits.
Do all versions of each gene always get expressed in an organism?
No, only dominant traits will be expressed.
How are dominant and recessive genes?
If you are talking about traits, dominant traits and recessive traits both have alleles. Dominant traits are alleles that cover up the expression of other alleles. One dominant allele with one recessive allele makes a dominant trait. Two dominant alleles together also make a dominant trate. Recessive traits are alleles that are only expressed when there is no dominant trait to cover them up. Two recessive alleles make a recessive trait. Traits can be passed over to the next generation. Two alleles together make a genotype, which is the inherited combination of alleles. Alleles: different versions of the same gene. Heredity: determined by genes. Genes: piece of DNA that shows the cell how to make a protein it needs.
Is a dominant trait seen in the first generation or the second generation?
Dominant traits tend to manifest whenever they are inherited. The real question is, "When do you see recessive traits?" Traits are coded in genes. We all inherit genes from both of our parents. If the dominant trait is capital Y and the recessive trait is lowercase y we can calculate the odds fairly easily. There are only four combinations that can be inherited from one pair of parents: YY, Yy, yY, and yy (this is usually visualized using a "punnet square"). Only in the case of both inherited traits being lowercase y will we see the recessive trait. Otherwise, we will usually see the dominant trait.
