Can two genetically identical organisms display different phenotypes?

Can two genetically identical organisms display different phenotypes?

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.

Can you have the same genotype but different phenotype?

Different genotypes can produce the same phenotype. Different genotypes can produce the same phenotype.

Is it possible for twins to have different genotype?

About one-third of twins are monozygotic twins. The result is dizygotic or fraternal twins. These two individuals share the same amount of genetic material as would any two children from the same mother and father. In other words, they possess a different genotype and phenotype.

Are non identical twins rare?

Fraternal – or dizygotic – twins form from two eggs that have been fertilized by two of the father’s sperm, producing two genetically unique siblings. But “semi-identical” twins are so rare, experts say they have only identified two cases – ever.

Can phenotype change without a change in genotype?

Different phenotypes can be generated without changes to the genotype through a process called Epigenetics. Epigenetics, meaning “above genes”, is the study of changes to the phenotype caused by changes in gene expression and not the alteration of the genetic code.

Who is the gene carrier for twins?

The quick answer to this question is that, in a twin pregnancy, it is the mother’s genes that determine twins. First up, giving birth to identical twins is not genetic, but conceiving fraternal twins is. The mother may have the genetic trait of releasing two eggs in one menstrual cycle.

Are all identical twins the same gender?

Identical twins are also known as monozygotic 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.

Why dont identical twins have the same fingerprints?

Fingerprints are partially determined by DNA. This explains why a pair of identical twins might appear to have similar fingerprints at first. Environmental factors from inside the womb also contribute to fetal fingerprint development, ensuring that identical twins’ fingerprints aren’t the same.

Do identical twins have 100% the same DNA?

Identical twins form from the same egg and get the same genetic material from their parents — but that doesn’t mean they’re genetically identical by the time they’re born.

What gender is most common in identical twins?

Here are your odds:

• Boy-girl twins are the most common kind of dizygotic twins, occurring 50% of the time.
• Girl-girl twins are the second most common occurrence.
• Boy-boy twins are the least common.

  Can a phenotype change?

  The phenotype may change constantly throughout the life of an individual because of environmental changes and the physiological and morphological changes associated with aging. Three types of natural selection, showing the effects of each on the distribution of phenotypes within a population.

  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 causes phenotypic difference?

  Phenotypes can be caused by genes, environmental factors, or a combination of both. Phenotypic variation, then, is the variability in phenotypes that exists in a population. All organisms can have phenotypic variation. In plants, flower color and leaf shape are examples of variable phenotypes.

  Is it possible for two persons to have exactly the same genotype?

  Uniqueness of Genotype Unless you’re an identical twin, your genotype is completely unique. Identical twins, however, share the exact same genotype, which is what makes them identical. Both twins have inherited the exact same genes from their parents.

  Do identical twins share the exact same DNA?

  It is true that identical twins share their DNA code with each other. This is because identical twins were formed from the exact same sperm and egg from their father and mother. (In contrast, fraternal twins are formed from two different sperm and two different eggs.)

  How does the phenotype depend on its genes?

  Genotype versus phenotype. An organism’s genotype is the set of genes that it carries. An organism’s phenotype is all of its observable characteristics — which are influenced both by its genotype and by the environment. For example, differences in the genotypes can produce different phenotypes.

  Are there phenotypic differences in genetically identical organisms?

  Phenotypic differences in genetically identical organisms: the epigenetic perspective Hum Mol Genet. 2005 Apr 15;14 Spec No 1:R11-8.doi: 10.1093/hmg/ddi116. Authors Albert H C Wong 1 , Irving I Gottesman, Arturas Petronis Affiliation

  What is the phenotype and genotype of identical twins?

  Genotype and phenotype. Monozygotic twins Identical or monozygotic twins occur when a single egg is fertilised to form 1 zygote that divides into 2 separate embryos. As a result, identical twins share identical DNA but may show differences in their phenotype due to environmental factors.

  When do phenotypic differences occur in twin and Inbred animals?

  Epigenetic mechanisms may explain paradoxical findings in twin and inbred animal studies when phenotypic differences occur in the absence of observable environmental differences and also when environmental differences do not significantly increase the degree of phenotypic variation.

  Are there any genetically identical organisms in the world?

  Human monozygotic twins and other genetically identical organisms are almost always strikingly similar in appearance, yet they are often discordant for important phenotypes including complex diseases. Such variation among organisms with virtually identical chromosomal DNA sequences has largely been …

  Phenotypic differences in genetically identical organisms: the epigenetic perspective Hum Mol Genet. 2005 Apr 15;14 Spec No 1:R11-8.doi: 10.1093/hmg/ddi116. Authors Albert H C Wong 1 , Irving I Gottesman, Arturas Petronis Affiliation

  Human monozygotic twins and other genetically identical organisms are almost always strikingly similar in appearance, yet they are often discordant for important phenotypes including complex diseases. Such variation among organisms with virtually identical chromosomal DNA sequences has largely been …

  Genotype and phenotype. Monozygotic twins Identical or monozygotic twins occur when a single egg is fertilised to form 1 zygote that divides into 2 separate embryos. As a result, identical twins share identical DNA but may show differences in their phenotype due to environmental factors.

  Why do offspring differ from their parents’genotype?

  The difference in genotype from generation gives rise to key traits that help species survive and flourish. When these species reproduce, they pass on their genes to their offspring who then will be able to survive.