Animalscaretips
We are all unique. As a result, identical twins share identical DNA but may show differences in their phenotype due to environmental factors. ...
- Do identical twins have variation in their phenotype?
- Will offspring always have the same phenotype?
- Can identical phenotypes have different genotypes?
- How could identical twins exhibit different phenotypes?
- What would be some obvious differences that could be observed in identical twins?
- How does genotype become phenotype?
- Why do genetically identical twins have different phenotypes?
- Why an older identical twin pair differs more significantly than a younger identical twin pair?
- How many different phenotypes are possible among the offspring?
- Why can individuals with different genotypes have the same phenotype quizlet?
- How do different genes in different species lead to different phenotypes?
- How do cells with the same genotype develop different phenotypes?
- What makes identical twins different?
- Why do genetically identical organisms look different?
- How does the development of identical twins differ from that of fraternal twins?
Do identical twins have variation in their phenotype?
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.
Will offspring always have the same phenotype?
When true-breeding, or homozygous, individuals that differ for a certain trait are crossed, all of the offspring will be heterozygous for that trait. If the traits are inherited as dominant and recessive, the F1 offspring will all exhibit the same phenotype as the parent homozygous for the dominant trait.
Can identical phenotypes have different genotypes?
Mandira P. Same phenotype but different genotype is possible due to presence of dominant allele. ... A person can have a dominant allele on both the homologous chromosomes (i.e. in double dose) while another person may have single dominant allele and a corresponding recessive allele.
How could identical twins exhibit different phenotypes?
From the epigenetic point of view, phenotypic disease differences in MZ twins result from their epigenetic differences. Due to the partial stability of epigenetic signals, a substantial degree of epigenetic dissimilarity can be accumulated over millions of mitotic divisions of cells of MZ co-twins.
What would be some obvious differences that could be observed in identical twins?
Some identical twins can have different heights and weights. This is because height and weight are controlled by what you eat as well your DNA. ... This can mean one twin starts getting more to eat even before they are born! Another physical difference between identical twins is their fingerprints.
How does genotype become phenotype?
Genotype & Phenotype. Definitions: phenotype is the constellation of observable traits; genotype is the genetic endowment of the individual. Phenotype = genotype + development (in a given environment). ... In a narrow "genetic" sense, the genotype defines the phenotype.
Why do genetically identical twins have different phenotypes?
This uniqueness is a result of the interaction between our genetic make-up, inherited from our parents, and environmental influences from the moment we are conceived. ... As a result, identical twins share identical DNA but may show differences in their phenotype due to environmental factors.
Why an older identical twin pair differs more significantly than a younger identical twin pair?
Senior author Manel Esteller of the Spanish National Cancer Center in Madrid and colleagues found that 35% of twin pairs had significant differences in DNA methylation and histone modification profiles. ... Statistical analysis suggested that older twin pairs were more epigenetically different than younger twins.
How many different phenotypes are possible among the offspring?
Figure 13: The possible genotypes for each of the four phenotypes. Even though only four different phenotypes are possible from this cross, nine different genotypes are possible, as shown in Figure 13.
Why can individuals with different genotypes have the same phenotype quizlet?
Each parent provides its offspring with one allele if every gene, so that the offspring inherits a pair if alleles for every gene. The combination of alleles in the offspring. ... The masking of recessive alleles can result in organisms with the same phenotype but different genotypes.
How do different genes in different species lead to different phenotypes?
Mutations can be inherited and therefore passed on from one individual to another. If a mutation causes a new phenotype that makes an organisms better suited to a particular environment, it can lead to rapid change in the characteristics of the individuals in that species.
How do cells with the same genotype develop different phenotypes?
In other words, researchers study how the same genotype can lead to very different phenotypes. ... Although these individuals share an identical genotype, their phenotypes differ as a result of how that genetic information is expressed over time and through their unique environmental interactions.
What makes identical twins different?
Identical Twins
They result from the fertilization of a single egg that splits in two. Identical twins share all of their genes and are always of the same sex. In contrast, fraternal, or dizygotic, twins result from the fertilization of two separate eggs during the same pregnancy.
Why do genetically identical organisms look different?
Epigenetics is the mechanism explaining how environment can affect the phenotype - it explains how your brain cells and skin cells carry the same DNA, but look completely different. In short, factors from the environment can cause small molecules can join onto the top of DNA, or onto the proteins it winds around.
How does the development of identical twins differ from that of fraternal twins?
Identical twins develop from one fertilized egg and can share the same placenta and have two separate or, rarely, one amniotic sac; fraternal twins develop from two separate eggs and grow in their own amniotic sac, according to the ACOG.
