Why would a pea plant that is heterozygous for plant height have the dominant phenotype? The dominant allele overpowers the recessive allele, causing the plant to be tall.
Why would a pea plant that is heterozygous for plant have the dominant phenotype?
Explanation: Heterozygous organisms carry one dominant allele and one recessive allele. The dominant allele is expressed over the recessive allele, giving the organism the dominant phenotype.
What is the phenotype of a pea plant with a heterozygous genotype for height?
Tall. What is the phenotype of a pea plant that is heterozygous ( Tt )? It is also tall. The answer is yes, two different genotypes can result in the same phenotype.
What is the dominant phenotype for plant height?
In plant, tall phenotype is dominant over dwarf phenotype, and the alleles are designated as T and – YouTube.
What is the phenotype of a heterozygous pea plant?
Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white).
Why human with heterozygous genotype will have the dominant phenotype?
Unlike homozygous, being heterozygous means you have two different alleles. You inherited a different version from each parent. In a heterozygous genotype, the dominant allele overrules the recessive one. Therefore, the dominant trait will be expressed.
How is it possible for an organism to have a recessive phenotype for a trait such as white flowers in pea plants?
How is it possible for an organism to have a recessive phenotype for a trait such as white flowers in pea plants? The organism inherits the recessive allele from both parents.
When a pea plant contains two different genes alleles for height it is said to be a?
Heterozygous means to have 2 different alleles for a trait.
What is the genotype of a pea plant homozygous for height?
genotype TT
a homozygous tall pea plant will have the genotype TT. A homozygous short pea plant will have the genotype tt.
Is it possible to determine the genotype of an individual having a dominant phenotype how?
Specifically, to detect the underlying genotype of an organism with a dominant phenotype, one must do a type of breeding analysis called a test cross. The test cross is another fundamental tool devised by Gregor Mendel.
What makes a phenotype dominant?
A dominant allele produces a dominant phenotype in individuals who have one copy of the allele, which can come from just one parent. For a recessive allele to produce a recessive phenotype, the individual must have two copies, one from each parent.
Which phenotype is dominant tall or short?
tall phenotype
In an organism, tall phenotype is dominant over recessive phenotype, and alleles are designated as T and small t, respectively.
What is a dominant phenotype?
Definition. A phenotype that occurs even when the causal allele occurs in a heterozygous individual.
Is heterozygous dominant or recessive?
An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype.
What happens to the phenotype of the heterozygotes when traits are inherited?
Mendel observed that a heterozygote offspring can show the same phenotype as the parent homozygote, so he concluded that there were some traits that dominated over other inherited traits. However, the relationship of genotype to phenotype is rarely as simple as the dominant and recessive patterns described by Mendel.
Which is a dominant trait that Mendel observed in pea plants?
These plants would serve as the P1 generation for the experiment. In this case, Mendel crossed the plants with wrinkled and yellow seeds (rrYY) with plants with round, green seeds (RRyy). From his earlier monohybrid crosses, Mendel knew which traits were dominant: round and yellow.
How do we know whether an organism expressing a dominant trait is homozygous or heterozygous?
To identify whether an organism exhibiting a dominant trait is homozygous or heterozygous for a specific allele, a scientist can perform a test cross. The organism in question is crossed with an organism that is homozygous for the recessive trait, and the offspring of the test cross are examined.
What does heterozygous dominant mean?
With respect to heterozygosity, this could take one of several forms: If the alleles are heterozygous recessive, the faulty mutated allele would be recessive and not express itself. Instead, the person would be a carrier. If the alleles are heterozygous dominant, the faulty allele would be dominant.
Which of the following is heterozygous dominant genotype?
So, the correct answer is D “Tt”.
Why are some pea plants tall and others short in nature explain with reference to the role of genes in controlling characteristics?
The recessive genes though present in the dominant individuals, these genes are suppresed by dominant genes. If the genotype is TT, then phenotype is Tallness of the plant. If the genotype if tt, then phenotype is dwarfness of the plant.
Can there be heterozygous recessive explain?
Recessive is a state or condition which expresses only in the presence of identical recessive genes. Heterozygous recessive is not possible as the recessive gene doesn’t express in the presence of a dominant gene. So only homozygous dominant, homozygous recessive and heterozygous dominant are possible.