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What is the difference between a pure plant and a hybrid plant?
True breeding plants are those that have a pure genotype for a specific trait. When bred, they will produce a specific phenotype. Hybrid plants are those that are the result of cross-pollinating two true breeding plants.
What is the genotype for the tall plant?
TT
Genotypes for plant height are TT, Tt, tt. Genotypes can be heterozygous or homozygous. Phenotypes for plant height are tall or short. TT and Tt genotypes both expressed the tall phenotype because the T is dominant to t.
What would be the phenotype of a cross between a homozygous dominant tall plant and a homozygous recessive short plant?
25% of the heterozygous cross are short, and the offspring of a homozygous dominant and homozygous recessive pea plant will always display the dominant trait (phenotype), because they are heterozygous.
How do you tell if a plant is a hybrid?
Hybrid plants often grow more vigorously than either parent. They also have other valuable features that distinguish them from the non-hybrid varieties, such as disease or pest resistance, larger yields, tolerance of high humidity, or novel colors or flower forms.
Are hybrid plants bad for you?
None of these methods are easily labeled good or bad and you won’t find much agreement on which is the best, either. Heirlooms are plants that have stood the test of time, hybrids are often more disease-resistant or higher-yielding, and GMOs although still the subject of many studies, can be lifesavers.
Can a short pea ever be a hybrid?
b. Explain how dominant and recessive alleles for the trait of stem height determine whether a pea plant will be tall or short. It can never be a hybrid because if it is short, it has two recessive short genes and for it to be a hybrid, it would have two different genes.
Is TT a genotype?
The genotype is represented by letter combinations, such as TT , Tt , and tt . When an organism has two of the same alleles for a specific gene, it is homozygous (homo- means “same”) for that gene. An organism can be either homozygous dominant ( TT ) or homozygous recessive ( tt ). The genotype expresses the phenotype.
When a plant homozygous for tall is crossed with a plant homozygous for dwarf what will be the appearance of the offspring of the cross of f1 with its dwarf parent?
The condition given is that a plant (Homozygous tall) is crossed with a plant (Homozygous dwarf), then the appearance of the plats or saplings at the F₁ generation would be all tall plants. The plants are homozygous tall, so their alleles will be the same.