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Genetics

What did Mendel get in his f2 generation?

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2014-08-27 00:53:32
2014-08-27 00:53:32

Mendels' f2 generation produce a 3:1 ratio of tall plants. By crossing true tall with true short , homologous chromosomes, he wound up with three types of plants, true tall, true short, and tall with a short allele.

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Mendel found a fixed pattern of inheritance in the ratio of 3:1 in the contrasting characters from F1 generation to F2.


He bred the F1 generation with itself


He bred the F1 generation with itself.



Crossed his F1 generation in self ferilization. F1 X F1


3:1 was the ratio of plants expressing contrasting traits that Gregor Mendel calculated in his F2 generation of garden peas.


In the F2 generation, Mendel self- pollinated the F1 generation. Three fourths of the offspring were tall. One third, however, were short. The trait seemed to come back from the P generation.



When Mendel crossed purebred tall-stemmed plants the first generationoffspring all had tall stems


Mendel observed that 315 seeds were round and yellow and another 32 were wrinkled and green, the two parental phenotypes.


To observe whether or not a recessive trait would reappear.


Mendel allowed F1 generation to selp polinate to get F2 .


Mendel observed the recessive trait in the f2 generation, and figured out that it must still be present in the f1 generation, even though it wasn't shown.


For each of the seven characters Medel studied,he found the same 3:1 ratio of plants expressing the contrasting traits in the f2 generation.


You cross two organisms from the F1 generation to get the F2 generation.



F2 refers to the F2 generation in genetics. First you have the P1 generation, or the 1st parents to cross. Next, their offspring is called the F1 generation. When the F1 generation offspring cross, then the F2 generation appears.


The Generation after the F1 generation.


The reason why short plants reappeared in Mendel's F2 generation of pea plants was because their short trait was heterozygous. Both parents carriedÊthat recessive gene, so they passed it on to their offspring.


step 1: Producing a true-breeding P generation. step 2: Producing an F1 generation. Step 3: Producing an F2 generation.


C) traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1


Yes - the generations are parent -> F1 -> F2


taken from a science textbook- Scientists today call these parent plants the parental generation, or P generation. The offspring from this cross are the first filial generation or the F1 generation. The word filial comes from filila and flilius, the Latin words for daughter and son. When the plants in the F1 generation were full-grown, Mendel allowed them to self-pollinate. Surprisingly, the plants in the F2 gneration were a mix of tall AND short plants. The shortness trait had reappeared even though none of the F2 parent plants were short. Mendel counted the tall and short plants. About three fourths of the plants were tall, while one fourths were short.


To answer this question, he allowed all seven (7) kinds of F1 hybrid plants to produce an F2 generation by self-pollination. In effect, he crossed the F1 generation with itself to produce the F2 offspring.


F1 isw the first generation F2 is the second generation



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