Since 1 out of 4 pea plants are short, or 1/4, the probability of a short pea plant from a heterozygous cross is 25%.
What is the genotype of a short pea plant?
Pea plants are tall if they have the genotype TT or Tt , and they are short if they have the genotype tt .
Are pea plants heterozygous?
A pea plant is heterozygous for both seed shape and seed color.
Is a tall pea plant heterozygous or homozygous?
Use a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous).
Is tall or short pea plant dominant?
tall plants
In pea plants, tall plants are dominant over short plants. If two heterozygous tall plants are crossed, what percent of the offspring will be short? In pea plants, tall plants are dominant over short plants.
Are short pea plants dominant or recessive?
recessive trait
However, shortness in pea plants is a recessive trait. This plant is a homozygous plant with a pure recessive trait for height. The offspring from this plant will be short if it pollinates with another plant that has two genes for shortness.
How can you tell if a pea plant is homozygous or heterozygous?
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). Carriers are always heterozygous.
How do you know if a plant is heterozygous?
Homozygous plants have two identical copies of a single gene. Heterozygous plants have two copies of a single gene, but those copies are alleles, or different versions of that gene. The second type is heterozygous. Plants that are heterozygous for a particular gene have one copy each of two different alleles, ‘Aa’.
What is a heterozygous pea plant called?
Therefore, a dihybrid organism is one that is heterozygous at two different genetic loci. In 1865, Gregor Mendel performed dihybrid crosses on pea plants and discovered a fundamental law of genetics called the Law of Independent Assortment.
Is pea plant homozygous?
A pea plant which is homozygous for Green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii].
What is the genotype of a homozygous short plant?
A homozygous short pea plant will have the genotype tt.
Why is progeny always tall when a tall pea plant is crossed with a short pea plant?
Answer: When a tall pea plant is crossed with a short pea plant, the resultant progeny is always tall because tall is dominant trait and short is recessive trait.
Which of the following is considered to be heterozygous tall?
A heterozygous tall plant will have a genotype of Tt. T is mainly the dominant allele and will actually rule over the t allele, which is recessive.
Can a short pea plant be a hybrid for the trait of stem height?
It can not, because short plant has two recessive alleles, and hybrid has one dominant and one recessive, so the hybrid would be tall because of dominant allele.
What is the probability that two heterozygous tall pea plants will produce a tall or short offspring?
As shown in the figure a cross between two heterozygous tall plants results in 25% homozygous tall, 50% heterozygous tall and 25% dwarf plants. Thus the correct answer is option C.
Why are some pea plants tall and some short?
The pea plant will grow taller if the gene sequence is such that it creates a hormone that impacts the height attribute. If the gene sequence is in such a way that this hormone is only produced in little amounts and is controlled by specific conditions, it will have no effect on height growth. It will be a short plant.
Is P generation always homozygous?
The P generation organisms are homozygous for the given trait. However, each parent possesses different alleles for that particular trait.
Which pea trait is recessive?
Because the allele that produces wrinkled peas is recessive, the offspring of this cross will all have wrinkled peas. Mendel then explains the concept of dominant and recessive alleles by saying, “By performing my experiments with peas, I learned a lot about genetics and how traits are passed on.
What is a recessive trait in pea plants?
Recessive traits become latent, or disappear, in the offspring of a hybridization. The recessive trait does, however, reappear in the progeny of the hybrid offspring. An example of a dominant trait is the violet-flower trait. For this same characteristic (flower color), white-colored flowers are a recessive trait.
How do you know if an allele is heterozygous?
An allele is one of two or more alternative forms of a gene, and they are found at the same place, or locus, on the chromosome. Heterozygous refers to having different alleles for a particular trait. If the two versions are different, you have a heterozygous genotype for that gene.
How can you tell if a genotype is heterozygous?
For every gene, you inherit two alleles: one from your biological father and one from your biological mother. Together, these alleles are called a genotype. If the two versions are different, you have a heterozygous genotype for that gene.