How Is It Possible That Individuals With Two Different Genotypes Can Have The Same Phenotype??
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.Mar 26 2017
How can two organisms with different genotypes have the same phenotype?
A dominant allele always expresses itself when it is present in the genotype. … Recessive alleles only demonstrate their effect if the individual has two copies of the alleles. Hence due to the presence of dominant alleles in the genotype of organisms phenotypes appear the same even though they differ in the genotypes.
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 is it possible that you can have two different alleles for the same trait?
Since diploid organisms have two copies of each chromosome they have two of each gene. Since genes come in more than one version an organism can have two of the same alleles of a gene or two different alleles. … This means that if a pea plant has two red alleles its flowers will be red.
Is it possible for two organisms to have the same physical characteristic but have a different genetic makeup?
MESSAGE. A single genotype may produce different phenotypes depending on the environment in which organisms develop. The same phenotype may be produced by different genotypes depending on the environment.
What are the differences between genotypes and phenotypes?
Genotype can be described as the genetic makeup of an organism. As humans are diploid organisms they have two alleles at each genetic position with one allele inherited from each parent. Phenotype refers to the physical properties of an organism which can be observed with our eyes.
Which of the following individuals would have the same phenotype?
b. Two organisms with the same genotype are homozygous. c. A heterozygous organism may have the same phenotype as a homozygous organism.
How can two plants that have different genotypes have the same phenotype quizlet?
Homozygous plants have two identical alleles for a particular trait TT or tt. In contrast heterozygous plants have two different alleles for a particular trait Tt. How can two plants that have different genotypes have the same phenotype? … In codominance the heterozygous phenotype shows both traits.
Do two organisms with the same phenotype have to have the same genotype explain your answer?
If two individuals have a certain phenotype it does not mean that they must have the same genotype. For example the possible genotype of a pea plant that has a tall phenotype can be homozygous dominant (TT) or heterozygous (Tt). Overall different genotypes can result in the same phenotypes.
Is it possible for more than two alleles of a gene to exist?
Although individual humans (and all diploid organisms) can only have two alleles for a given gene multiple alleles may exist in a population level and different individuals in the population may have different pairs of these alleles.
How many possible genotypes can be formed out of these alleles?
Genotype is also used to refer to the pair of alleles present at a single locus. With alleles ‘A’ and ‘a’ there are three possible genotypes AA Aa and aa. With three alleles 1 2 3 there are six possible genotypes: 11 12 13 22 23 33.
Why can humans only have 2 alleles?
Why can humans only have 2 alleles? Since diploid organisms have two copies of each chromosome they have two of each gene. Since genes come in more than one version an organism can have two of the same alleles of a gene or two different alleles.
How can individuals of the same species and even siblings have different characteristics?
Each gene can have several variants called alleles which code for different variants of the trait in question. Genes reside in a cell’s chromosomes each of which contains many genes. … In species that reproduce sexually each cell contains two variants of each chromosome one inherited from each parent.
Why different individuals within a population are genetically different from each other?
Genetic variation can be caused by mutation (which can create entirely new alleles in a population) random mating random fertilization and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).
Why do different individuals of the same species have different traits?
The variation and distribution of traits in a population depend on genetic and environmental factors. Genetic variation can result from mutations caused by environmental factors or errors in DNA replication or from chromosomes swapping sections during meiosis.
What is the difference between genotype and phenotype give examples of each?
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics. For example having blue eyes (an autosomal recessive trait) is a phenotype lacking the gene for brown eyes is a genotype.
What’s the difference between genotype and phenotype quizlet?
The phenotype is an organism’s physical appearance and the genotype is the genetic makeup.
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.
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.
What is the genotype of an individual?
What is it called if there are more than one dominant allele and each present itself?
Codominance
= Codominance is a relationship between two versions of a gene. Individuals receive one version of a gene called an allele from each parent.
How are Punnett squares used in genetics?
What is the term that describes an organism that has two identical dominant or two identical recessive alleles for a particular trait?
If an organism contains two identical alleles for a particular trait the genotype for this trait is said to be homozygous.
How can the same genotype can result in multiple phenotypes under different environmental conditions?
However when the same genotype is subjected to different environments it can produce a wide range of phenotypes. These phenotypic variations are attributable to the effect of the environment on the expression and function of genes influencing the trait.
How is it possible to have 6 different genotypes and 4 phenotypes?
There are three alleles involved A B and O and six possible genotypes: AA BB OO AB AO and BO. The various genotypes result in four different phenotypes or blood types: A B O and AB. Individuals have blood type A if their genotypes are AA or AO.
How can a gene exist in more than one form?
Most genes exist in more than one form that when expressed result in different characteristics. At the genetic level alleles contain differing base sequences in their nucleic acid (e.g. DNA). … As a form of a gene an allele carries the instructions for a particular variation of the gene’s protein product.
What are multiple alleles can a person have more than two alleles for a single gene explain your answer?
multiple alleles Three or more alternative forms of a gene (alleles) that can occupy the same locus. However only two of the alleles can be present in a single organism. For example the ABO system of blood groups is controlled by three alleles only two of which are present in an individual.
How many genotypes are possible with 2 alleles?
With 2 alleles the number of genotypes is 1 + 2 = 3. 3 alleles there are 1 + 2 + 3 = 6 genotypes.
How many genotypes can be produced by two alleles A and A?
AA Aa aa are the genotypes that can be produced by 2 alleles. Q3.
How can two alleles from different genes be inherited together?
How can two alleles from different genes be inherited together? Alleles of different genes tend to be inherited together when those genes are on the same chromosome. … The offspring recieved one recessive allele from each parent.
Genotype vs Phenotype | Understanding Alleles
When two different genotype produce the same phenotype due to environmental difference then each