Can there be two people with identical phenotypes?

It is also tall. 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).

Can people have identical phenotypes?

Uniqueness of Phenotype

Everyone has a unique phenotype — even identical twins. For most people, your genotype is unique, and even if you’re an identical twin you may be subject to different environmental influences and experiences than your twin; as a result, your phenotype will be different.

Can two individuals have the same phenotype but different genotypes?

Due to the presence of a dominant allele, the same phenotype but distinct genotype is possible. … On both homologous chromosomes, a person can have a dominant allele, while another person may have a single dominant allele and a corresponding recessive allele.

Can two people have the same genetic traits?

Of course, a lot of the gene pairs in your genome are actually the same, so it wouldn’t matter which copy you used, but the odds of constructing an exact duplicate genome by chance are still vanishingly small. And even identical twins don’t necessarily have identical DNA.

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Could there be someone in the world that is phenotypically identical to you?

Yes, it is very likely that two human can look very similar, possibly even identical, but they will never be genetically identical. The odds of this happening are so as close to zero as you can get. Yes, it is possible for two humans to be genetically identical, but so slim that our world may never see.

Can twins have different genotypes?

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.

Do identical twins have the same phenotype?

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. This is apparent in the fact that close relations can always tell them apart, even though others might not be able to see the subtle differences.

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.

Why don t similar genotypes produce the same phenotype?

Why don’t similar genotypes always produce the same phenotype? Animals display different phenotypes dependent on diet, not genotype. … the allele’s frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change.

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Is TT recessive?

An organism can be either homozygous dominant ( TT ) or homozygous recessive ( tt ). If an organism has two different alleles ( Tt ) for a certain gene, it is known as heterozygous (hetero- means different). Phenotype is a way to describe the traits you can see.

Can siblings have identical DNA?

A portion of the DNA full siblings inherit will be the exact same DNA from both parents. The siblings will match at the same location on their DNA on both the mother’s and father’s strand of DNA. Half Siblings: Unlike full siblings, half siblings only match DNA on the one parent they share in common.

How many different phenotypes are possible?

There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes.

Do identical twins share DNA?

Dr. Cantor explains that in most instances, a pair of identical twins share the same DNA when they split. However, she continues, a recent report found that some developing twin embryos may already have genetic differences.

Can you change your phenotype?

The phenotype may change constantly throughout the life of an individual because of environmental changes and the physiological and morphological changes associated with aging. … The interplay between genotype and phenotype is remarkably complex, however.

How much of human DNA is identical?

All human beings are 99.9 percent identical in their genetic makeup. Differences in the remaining 0.1 percent hold important clues about the causes of diseases.

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Can phenotypic plasticity evolve?

If the optimal phenotype in a given environment changes with environmental conditions, then the ability of individuals to express different traits should be advantageous and thus selected for. Hence, phenotypic plasticity can evolve if Darwinian fitness is increased by changing phenotype.