What causes different phenotypes to appear in a species?
Phenotypic variations may be caused by differences in long-term programming of gene function rather than variation in gene sequences per se, and studies of the basis for inter-individual phenotypic diversity should consider epigenetic variations in addition to genetic sequence polymorphisms.
Can two organisms have different phenotypes but the same genotypes?
Can organisms with different genotypes have the same phenotypes? … The answer is yes, two different genotypes can result in the same phenotype. Remember, the recessive phenotype will be expressed only when the dominant allele is absent, or when an individual is homozygous recessive (tt) (Figure below).
Why can different phenotypes result from different levels of gene expression?
The different genes or alleles caused by mutation can be passed on to successive generations, resulting in different phenotypic traits. … If an organism inherits two different alleles, it is heterozygous and may express more than one phenotypic trait. The phenotypic traits can be dominant or recessive.
Is it possible for two organisms with the same genotype to have different phenotypes explain your answer?
Even two organisms with identical genotypes normally differ in their phenotypes. … Identical twins share the same genotype, since their genomes are identical; but they never have the same phenotype, although their phenotypes may be very similar.
How can two organisms have the same phenotype but different genotypes quizlet?
The combination of alleles in the offspring. … The masking of recessive alleles can result in organisms with the same phenotype but different genotypes. Organisms with two dominant alleles (homozygous dominant and one recessive allele (heterozygius).
What are the two main reasons for variation between organisms of the same species?
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
How do different genotypes result in different phenotypes?
A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism’s parents, the phenotype is not. Whilst a phenotype is influenced the genotype, genotype does not equal phenotype. The phenotype is influenced by the genotype and factors including: Epigenetic modifications.
What does an organism phenotype describe?
The term “phenotype” refers to the observable physical properties of an organism; these include the organism’s appearance, development, and behavior. An organism’s phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes.