In the case of Mendel’s peas, there are two different versions, or alleles, for seed color: yellow (Y) and green (y). Every plant will have two copies of each gene. We call this combination of alleles the plant’s genotype. The seed color we can observe is called the phenotype.
What are the two different alleles that can result from seed shape in pea plants?
A pea plant is heterozygous for both seed shape and seed color. S is the allele for the dominant, spherical shape characteristic; s is the allele for the recessive, dented shape characteristic.
Why is the allele for green seed color in garden peas considered recessive?
Answer and Explanation: The allele for wrinkled seed shape in garden peas is considered recessive because the trait associated with the allele is not expressed in heterozygotes.
Are green seeds dominant or recessive?
recessive
Seed color is governed by a single gene with two alleles. The yellow-seed allele is dominant and the green-seed allele is recessive.
Which alleles are dominant in Mendel’s pea plants?
From his earlier monohybrid crosses, Mendel knew which traits were dominant: round and yellow.
What are multiple alleles?
Multiple alleles are the alternative forms of the same gene so they influence the same trait. The wild-type allele is mostly dominant over the mutant alleles. The wild type is considered the standard and all other alleles are considered variants.
What is the offspring of TT and TT?
Because Tis dominant, plants with the genotype TT and Tt will be tall. Only the offspring with the genotype tt will be short. squares.
What are the two alleles of the seed color trait being considered here?
Seed color is governed by a single gene with two alleles. The yellow-seed allele is dominant and the green-seed allele is recessive.
What is meant by a recessive allele?
Definition. A type of allele that when present on its own will not affect the individual. Two copies of the allele need to be present for the phenotype to be expressed.
What is the dominant seed color in a pea plant?
yellow
For the seed colour, yellow is the dominant trait and green is recessive while for the fruit (pod) colour, green is dominant and yellow is recessive.
Which of the character is dominant in pea plant?
So, the correct answer is ‘green pod‘.
Is green color dominant?
Green and red colour of seeds are the recessive and dominant traits respectively.
Which is dominant green or yellow in pea plant?
yellow seeds
If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants could you expect in F1-generation.
What does it mean for an allele to be dominant?
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
How many genes are present in pea plant?
seven genes
Because Mendel used seven genes and peas have seven pairs of chromosomes, it is tempting to think that each gene is on a different chromosome, especially given that Mendel reported that the genes were inherited independently of each other.
What is the difference between a gene and an allele?
So, what it is the difference between a gene and an allele? The short answer is that an allele is a variant form of a gene. Explained in greater detail, each gene resides at a specific locus (location on a chromosome) in two copies, one copy of the gene inherited from each parent.
How many types of alleles are there?
Dominant: The allele which shows its full expression in a population. Recessive: The allele which is unable to show its full expression or expresses very less in a population.
What is allele in biology?
An allele is one of two or more versions of DNA sequence (a single base or a segment of bases) at a given genomic location. An individual inherits two alleles, one from each parent, for any given genomic location where such variation exists. If the two alleles are the same, the individual is homozygous for that allele.
What is an example of a multiple allele trait?
Multiple Allele Traits
An example is ABO blood type. Your blood type refers to which of certain proteins called antigens are found on your red blood cells. There are three common alleles for this trait, which are represented by the letters IA, IB, and i.
What is the genotype ratio of TT and TT?
When a heterozygous plant is self crossed with itself in a monohybrid cross, the genotypic ratio obtained is TT:Tt:tt = 1:2:1.
What is the phenotype of a pea plant with genotype TT?
tall plant
As the given genotype is Tt , it’s a heterozygous condition and in heterozygous condition the dominant trait (T – tall) will express itself. Hence, the phenotype of Tt will be a tall plant.