A few factors, mainly crossing-over in meiosis, random fertilization, and random separation of sister chromosomes in meiosis. There are also mutations, though they tend to have less of an impact of phenotypes.
Asked in Botany or Plant Biology, Taxonomy
Variation in phenotype expression may be caused by?
Variation in phenotype expression is caused by 3 things: Age, Environment, and Interaction with other genes in the genotype. ...
Asked in Biology
The idea that organisms with a particular genotype will have better reproductive success than organisms with a different genotype is called?
Sexual selection is a type of natural selection resulting from variation in the ability to obtain mates. ...
Asked in Genetics
Is it true that phenotype determines genotype?
No, that is incorrect. Genotype (genetics) determines the phenotype (physical characteristics and traits) of an individual organism. You have to think logically about it. Why do we have the phenotypes that we have? Most of them are caused by the genetic code in our DNA (our genotype). ...
Asked in Science
What is the observation of a wet spot on a hot highway in the summer caused by?
This is caused by refraction. A variation in air density corresponds to variation in refractive index of the air, locally near the road. ...
Asked in Botany or Plant Biology, Genetics, Pronouns
What is genotype variation?
Genotype variation is the change in the genetic constitution of the infant. Genotype means the genetic constitution of individual, but due to the exchange in the genetic material of the parents some changes takes place in genes of infants that is what reflects in infants. A father is bald. His hair growth is least but it's not necessary that his son will be bald. He may or may not be bald because some genes of mother also do contribute to the sons...
Asked in Population
What can happen to a population of organism with limited variation in the genotype if environmental condition changes?
It will die off if the environmental condition changes drastically. This is because if the gene pool is large, i.e. lots of variation in the genotype, natural selection causes some to die off but others can still survive if they have characteristics adapted to the new conditions. But if the genotype is limited, they sadly don't have "other forms" of genes, so if the new condition is bad for them, the population is equally affected and they die. ...
Asked in Charles Darwin, Evolution
What are variations in terms of evolution?
Normally variations might be differences in genotype between individuals. However, in evolution, the genotype isn't important; rather, the phenotype is what interacts with the environment. In other words, two organisms can have different genotypes (seeming variation), but be equally fit to survive because their phenotypes are the same. Therefore, variation in an evolutionary sense would be differences in phenotype, the outward appearance or function of a trait. ...
Why are mutation in body cells not a source of genetic variation?
A mutation in body cells is not a source of genetic variation because the variation was not caused by sexual reproduction. Mutations in body cells also normally aren't passed down. ...