Could a short pea plant be heterozygous?Asked by: Mary Ortiz II
Score: 4.2/5 (51 votes)
No, the gene or allele for short or dwarf pea plants is recessive. A short plant is produced if both alleles are short plants is present.
Can a short stemmed pea plant ever be heterozygous Why or why not?
Can a short pea plant ever be a hybrid for the trait of stem height? Why or why not? As part of your explanation, write the letters that represent the alleles for stem height of a short pea plant. No, a short plant has two recessive (tt); hybrids have two different alleles for at trait (Tt).
Are short pea plants dominant or recessive?
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.
What makes one pea plant tall and one pea plant short?
The trait of height for a pea plant is determined by two genes, one from each parent. Each trait of an organism is determined by at least one gene from each parent. Homozygous Plants Mendel found that one kind of pea plant always had tall offspring.
When you cross a tall pea plant with a short pea plant the offspring will be?
When a tall and short plant are crossed, all of the offspring are tall. If the offspring self-fertilize, they produce tall and short plants in a ratio of 3:1 in the next generation.
What offspring is produced if a heterozygous tall pea plant is crossed with a homozygous short pea plant?
The "TT" and "Tt" crosses both have at least one "T" allele, so they are tall plants. However, the last cross "tt" doesn't have any "T" alleles and is short, because it is homozygous recessive . 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 a hybrid tall?
Hybrids are the one which carries contrasting allele of a particular gene; for example, hybrid tall plant's genotype is “Tt”. Segregation of these contrasting factors of hybrid produces both tall and dwarf plants in the progeny. Pure breeding and hybrid dominant exhibit same phenotype.
Why did Mendel selected pea plant?
Mendel choose pea plants for his experiments because of the following reasons: (i) The flowers of this plant are bisexual. (ii) They are self-pollinating, and thus, self and cross-pollination can easily be performed. (iii) The different physical characteristics were easy to recognize and study.
Why did Mendel study pea plants?
Mendel was curious about how traits were transferred from one generation to the next, so he set out to understand the principles of heredity in the mid-1860s. Peas were a good model system, because he could easily control their fertilization by transferring pollen with a small paintbrush.
What is heterozygous example?
If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.
What kind of offspring would a cross between two heterozygous tall pea plants give?
A cross between two heterozygous tall plants, it will result in 25% homozygous tall (TT), 50% heterozygous tall (Tt) and 25% short plants (tt). Phenotype: 75% tall, 25% short. Hope this helps!!
What does heterozygous look like?
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).
Why are the offsprings 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. Therefore, dominant trait expresses itself in the progeny.
Why is the progeny always tall when a homozygous tall pea plant is crossed with a short pea plant?
The trait that can express itself in homozygous condition only is known as recessive trait. The cross between tall and short pea plant produces the tall progeny. The tall progeny is present in heterozygous condition and the tall trait is dominant that express itself and hides the expression of short trait.
When two pea plants that are heterozygous for yellow peas are crossed the resulting offspring have a genotypic ratio of?
The P cross produces F1 offspring that are all heterozygous for both characteristics. The resulting 9:3:3:1 F2 phenotypic ratio is obtained using a Punnett square. In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y).
What is the chance that Bernard will have pea plant offspring?
Bernard is looking for offsprings with green and wrinkled seeds phenotype. The genotype of this can either be; YYrr or Yyrr. Based on the punnet square, only three (3) offsprings will possess such genotypes, hence, the probability of getting a pea offspring with green and wrinked seed is 3/16.
Which Mendel generations were allowed to self-pollinate?
Mendel allowed the first-generation plants to self-pollinate. Figure 5 also shows what happened when a first-generation plant with purple flowers was allowed to self-pollinate. As you can see, the recessive trait for white flowers reappeared in the second generation.
How many alleles does a pea plant have for height?
four alleles from each parent. 6 If a pea plant's alleles for height are tt, what is true of its parents?
What happened to the green trait in Mendel's pea plants?
When this gene isn't working, the chlorophyll stays around and the pea is green. So in this case the recessive trait is indeed due to a broken gene. Green happens when a gene that turns on chlorophyll-degrading genes isn't working. Which makes explaining why yellow is dominant a bit easier.
What trait in pea plants is being studied?
The trait that is being studied is the height of the pea plants.
What is the genotype of a heterozygous tall pea plant?
In pea plants height is characterized by having two alleles T(tall) and t(dwarf). Since heterozygous tall pea plant (Tt is the genotype in heterozygous) is crossed with a dwarf pea plant (tt is the genotype in dwarf).