That depends on which color is dominant. If red is dominant, then F1 will all be red heterozygous. If orange is dominant, then same applies.
If you cross a purebred dominant and a purebred recessive individual, the offspring would be considered hybrids, not purebreds. Purebreds result from breeding within the same purebred line, whereas hybrids are the result of crossing individuals from two different purebred lines.
All the offspring were tall plants. This is because the tall trait is dominant over the short trait in Mendel's experiments on pea plants.
Mendel hypothesized that first-generation plants, when crossed, would display a dominant trait in their offspring. He observed that when he crossed purebred plants with contrasting traits, such as tall and short pea plants, the resulting first-generation (F1) plants exhibited only the dominant trait. This led him to propose the concept of dominance in inheritance, suggesting that some traits mask the expression of others in the presence of a dominant allele.
Rr
Gregor Mendel discovered that when he crossed a tall plant with a short plant, all the resulting offspring were tall. This indicated that the trait for tallness was dominant over the trait for shortness.
If you cross a purebred dominant and a purebred recessive individual, the offspring would be considered hybrids, not purebreds. Purebreds result from breeding within the same purebred line, whereas hybrids are the result of crossing individuals from two different purebred lines.
Both alleles for feather color are dominant.
I think not as tall is the dominant allele here.T = tallt = shortTT X ttall would beTt======and tall.
Crossed or Mutts
All the offspring were tall plants. This is because the tall trait is dominant over the short trait in Mendel's experiments on pea plants.
The phenotype of the F1 generation was all tall.
There is no such thing at a Thoroughbred Arabian. There are Thoroughbreds, Arabians, and Anglo-Arabians ( Thoroughbred crossed with Arabian). So assuming you meant Purebred Arabian they run at speeds of 18 to 20-25 MPH.
Rr
Gregor Mendel discovered that when he crossed a tall plant with a short plant, all the resulting offspring were tall. This indicated that the trait for tallness was dominant over the trait for shortness.
All of the F1 plants of Mendel's peas were tall because the tall trait was dominant over the short trait. Mendel crossed purebred tall peas (TT) with purebred short peas (tt), resulting in F1 offspring that all inherited one tall allele from each parent (Tt). Since the presence of just one dominant allele (T) is enough to express the tall phenotype, all F1 plants exhibited the tall trait.
Purebred tall plants can be crossed with purebred short plants to produce hybrid offspring with intermediate heights. This type of cross is an example of an incomplete dominance inheritance pattern where the traits from both parent plants are partially expressed in the offspring.
Most teachers will designate the dominant gene capital letter. In Mendel's experiment he crossed purebred Tall (T) with purebred short (t). He got all Tall plants as a result. Tall purebreed genotype is TT and the resulting generation was all tall by heterozygous with a genotype of Tt.