Admin Table of Contents
- 1 Why was it important that Mendel used pure-breeding lines?
- 2 What is pure line in Mendel experiment?
- 3 Why was it important for Mendel to use only pure homozygous plants for his initial experiments?
- 4 What was important about using true-breeding lines?
- 5 What conclusions did Mendel draw from his experiments?
- 6 Who was Gregor Mendel What did he use for his experiments?
- 7 How did Mendel predict the F1 and F2 generation of plants?
- 8 What is Mendel’s law of segregation?
Why was it important that Mendel used pure-breeding lines?
By experimenting with true-breeding pea plants, Mendel avoided the appearance of unexpected traits in offspring that might occur if the plants were not true breeding.
What is pure line in Mendel experiment?
Pure Line – a population that breeds true for a particular trait [this was an important innovation because any non-pure (segregating) generation would and did confuse the results of genetic experiments] Results from Mendel’s Experiments. Parental Cross.
Why did Mendel use pea plants in his experiments?
To study genetics, Mendel chose to work with pea plants because they have easily identifiable traits (Figure below). For example, pea plants are either tall or short, which is an easy trait to observe. Mendel also used pea plants because they can either self-pollinate or be cross-pollinated.
Why was it important that the pea plants were pure or true?
Mendel began with pure-breeding pea plants because they always produced progeny with the same characteristics as the parent plant. Mendel cross-bred these pea plants and recorded the traits of their progeny over several generations.
Why was it important for Mendel to use only pure homozygous plants for his initial experiments?
Because their genetic make up is known for sure to be homozygous so the offspring’s genotype is known for sure. This means that the phenotype of the offspring can tell which trait is dominant.
What was important about using true-breeding lines?
A true-breeding organism passes down the exact same traits that they have to its offspring. The presence of observable traits in the pea plants made it easier for Mendel to tell any differences in the plants’ form during his experiment.
What is the purpose of pure line selection?
Pure-line selection involves selecting and breeding progeny from superior organisms for a number of generations until a pure line of organisms with only the desired characteristics has been established.
Why does a pure line become genetically variable with time?
Because the parent plant was homozygous and self-fertilized. The variation present within a pure line is environmental andnon heritable. So selection within pure line is not effective. Pure lines become genetically variable with time.
What conclusions did Mendel draw from his experiments?
—and, after analyzing his results, reached two of his most important conclusions: the Law of Segregation, which established that there are dominant and recessive traits passed on randomly from parents to offspring (and provided an alternative to blending inheritance, the dominant theory of the time), and the Law of …
Who was Gregor Mendel What did he use for his experiments?
pea plant traits
Mendel used seven pea plant traits in his experiments which include flower color (purple or white), flower position (axil or terminal), stem length (long or short), seed shape (round or wrinkled), seed color (yellow or green), pod shape (inflated or constricted), and pod color (yellow or green).
What traits did Mendel study in his experiments?
Seed shape was one of the traits Mendel studied in his first set of experiments. Mendel first experimented with just one characteristic of a pea plant at a time. He began with flower color. As shown in the figure below, Mendel cross-pollinated purple- and white-flowered parent plants.
How did Mendel predict the pollination of purple flowers?
To test this prediction, Mendel allowed the F1 generation plants to self-pollinate. He was surprised by the results. Some of the F2 generation plants had white flowers. He studied hundreds of F2 generation plants, and for every three purple-flowered plants, there was an average of one white-flowered plant.
How did Mendel predict the F1 and F2 generation of plants?
To test this prediction, Mendel allowed the F1 generation plants to self-pollinate. He was surprised by the results. Some of the F2 generation plants had white flowers.
What is Mendel’s law of segregation?
It states that there are two factors controlling a given characteristic, one of which dominates the other, and these factors separate and go to different gametes when a parent reproduces. Mendel first researched one characteristic at a time. This led to his law of segregation.