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.
How is it possible that two organisms can have the same phenotype but different genotypes for a specific trait give a specific example to support your answer?
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).
Can you have 3 genotypes?
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.
How can two organisms have the same phenotype but different genotypes quizlet?
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).
Can 2 people have the same phenotype?
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.
What is phenotype example?
Examples of phenotypes include height, wing length, and hair color. Phenotypes also include observable characteristics that can be measured in the laboratory, such as levels of hormones or blood cells.
Can a person’s genotype be determined by their phenotype?
No, a person’s genotype cannot be determined solely by their phenotype as many genes in our genome do not get expressed.
Is AA a genotype?
What is a Genotype? … There are four hemoglobin genotypes (hemoglobin pairs/formations) in humans: AA, AS, SS and AC (uncommon). SS and AC are the abnormal genotypes or the sickle cells. We all have a specific pair of these hemoglobin in our blood which we inherited from both parents.
How many phenotypes are produced by 3 genotypes?
When the gene for one trait exists as only two alleles & the alleles play according to Mendel’s Law of Dominance, there are 3 possible genotypes (combination of alleles) & 2 possible phenotypes (the dominant one or the recessive one).
Can a genotype change?
Genotype generally remains constant from one environment to another, although occasional spontaneous mutations may occur which cause it to change. However, when the same genotype is subjected to different environments, it can produce a wide range of phenotypes.