Snapdragon flower color is an example of incomplete dominance (neither allele is dominant). When the allele is homozygous (AA) the flowers are red and when it is homozygous (aa) the flowers are white. However, when the alleles are Aa (heterozygous), the flowers are pink. This is referred to as an indeterminant trait.
What is the phenotype of heterozygous Snapdragon?
5. In snapdragons, flower color is controlled by incomplete dominance. The two alleles are red (R) and white (R’). The heterozygous genotype is expressed as pink.
What is the phenotype of a heterozygous for flower?
Heterozygous plants show a BLENDED INTERMEDIATE phenotype of PINK flowers.
What phenotype do snapdragon plants with a heterozygous genotype for flower color have?
Given that the snapdragons show incomplete dominance for this trait, we can assume that when they have this heterozygous genotype that their flower color will be a blend between white and red, which is pink flowers.
What is the phenotype of the snapdragon offsprings?
The genotype for the pink flower is Rr and the genotype for the white flower is rr. This would lead to a 50% chance of the offspring having a phenotype of pink.
What means phenotype?
A phenotype is an individual’s observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype. Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors.
What is the possible phenotype?
The phenotype is the physical manifestation of an organism’s allellic combination (genotype). For the pea plants, if the red allele is dominant and the white allele is recessive, only two phenotypes are possible. … The phenotype can be either red or white flower color, depending on the genotype.
Which is a heterozygous genotype?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb. Finally, the genotype of an organism with two recessive alleles is called homozygous recessive. In the eye color example, this genotype is written bb.
What is the phenotype of a homozygous dominant?
A homozygous dominant allele combination contains two dominant alleles and expresses the dominant phenotype (expressed physical trait). A homozygous recessive allele combination contains two recessive alleles and expresses the recessive phenotype. … The phenotypic ratio in this cross is 3:1.
Is PP genotype or phenotype?
There are three available genotypes, PP (homozygous dominant ), Pp (heterozygous), and pp (homozygous recessive). All three have different genotypes but the first two have the same phenotype (purple) as distinct from the third (white).
What is the phenotype of a plant with genotype RR?
For this plant, the genotype for leaf color is RR , which is homozygous dominant, consisting of two dominant alleles. Since the only allele possible is dominant, the plant will express the dominant phenotype, which is red leaf color.
What happens to the phenotype of the heterozygotes when traits are inherited in a dominance pattern?
Dominant alleles will be more visible in the phenotype of the organism. … Flowers are commonly cited as an example of incomplete dominance, wherein different parts of the flower can have different colors and patterns with no apparent relationship to the physical structure of the flower.
How do you find the phenotypic ratio?
Write the amount of homozygous dominant (AA) and heterozygous (Aa) squares as one phenotypic group. Count the amount of homozygous recessive (aa) squares as another group. Write the result as a ratio of the two groups. A count of 3 from one group and 1 from the other would give a ratio of 3:1.
What is the phenotype of the offspring?
The two things a Punnett square can tell you are the genotypes and phenotypes of the offspring. A genotype is the genetic makeup of the organism. This is shown by the three genetic conditions described earlier (BB, Bb, bb). The phenotype is the trait those genes express.
What is the phenotype of a plant?
The phenotype of a plant is a term used to describe observable characteristics, such as height, biomass, leaf shape and so on. We use the term phenotype in a more specific context to describe the collective expression of the genotype in conjunction with the environment on a plant’s observable characteristics.
What is the phenotype of a plant with the genotype?
When ever the R gene is present in the genotype of a plant, the flower color is always red. The mutant form of this gene, which is recessive, is often written r. Plants with the genotype RR or Rr have red flowers. Plants with the genotype rr have white flowers.