Pure Red Tomatoes When A Pure Breeding Tall?
When a pure breeding tall? - pure red tomatoes
1. If a pure red fruit breeding tomato plants produce large yellow fruit with a pure bred dwarf tomato plant to produce berries were all F1 generation plants grown produce and exceeded. Exceed the members of the F1 generation of whole plants with the phenotypes in the F2 generation, consider the following points:
368 plants of high production of red fruits
124 factories that produce high-yellow fruit
118 dwarf plants produce red berries
40 plants, fruits yellow dwarf
1. Bred crossing the height of tomato plants to produce yellow fruit
with a pure bred dwarf tomato produces red berries, all of the F1 generation
Stories high, and it was red fruit. Members of the F1 cross
Generation in the whole plant with the following phenotypes were observed in
F2 Generation:
368 plants of high production of red fruits
124 factories that produce high-yellow fruit
118 dwarf plants produce red berries
40 plants, fruits yellow dwarf
a) If one or monohybrid dihybrid cross?
I know it is a cross dihybrid
b) Explain how you say that this cross is due to Mendel's laws to the
Inheritance.
F1 3:1
F2 9:3:3:1
c) But understand this question TSD Explain how you say that this cross has been prepared in accordance with disgust.
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4 comments:
I have no idea what you mean by an agreement on the rejection, but the reasons are quite understandable F2, if you have a table and fill in all possible combinations of genes resulting from crosses of F1 gene (under the laws of Mendelian .)
Of course, the gene on the gene with a high short-term (I call them by T and S dominant below).
And the red over the yellow gene dominant gene Rated (R and Y).
So the possible combinations are shown in the following table:
..... ..... ..... T ..... TY ..... RS ..... SY
..... ..... ..... ------------------ --------------------
..... .... TR | TR ..... T ..... T ...... TR
..... ..... ....|
..... .... TY | TR ..... TY ..... T ...... TY
..... ..... ....| \\ \\ \\ \\ \\ \\ \\ \\ U0026lt;br> ..... .... SR | TR ..... T ..... SR ...... SR
..... ..... ....|
..... .... SY | T ..... TY ..... SR ...... SY
Now, simply count the number of characters from each combination, and received
.... TR ... Ty ... MR. SY
..... 9 ..... 3 ..... 3 ..... 1
This corresponds to the proportions observed in the power of the second generation.
It is therefore a simple example of the normal laws of Mendelian crossing the dominant and recessive genes.
In b) is half won. The F2 9:3:3:1 ratio is correct, but Formula 1 is not 3:1, are all the same height and red. In an F2 cross monohybrid a ratio of 3:1.
c) It is more common, related to the repulsion and coupling to improve the jumping genes.
This means that each parent, the dominant allele of a recessive trait carries and leads the contrary.
While SAL SAL x (H x yellow, red shorts).
The opposite is called coupling, and parents who were both dominant or recessive, and both the cross:
X SAL SAL
I was not familiar with the concept, but with the genes do. Repulsion "A" (or "trans"), this provision means that a dominant gene linked to a location on a chromosome to a recessive gene in another part of the chromosome, while means "pair" (or "IRC") that dominant and recessive are linked.
http://books.google.com/books?id=8AZ-Fnk ...
Page 167, says this source, the repulsion. May help
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