1 Answer. 25% of the heterozygous cross are short, and the offspring of a homozygous dominant and homozygous recessive pea plant will always display the dominant trait (phenotype), because they are heterozygous.
When a tall plant is crossed with a short plant?
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 law of inheritance is involved if a tall pea plant crossed with a short pea plant and produced all tall offspring?
Blending Theory of Inheritance
For example, a tall plant and a short plant had offspring that were either tall or short but not medium in height. Observations such as these led Mendel to question the blending theory.
What offspring is produced if a heterozygous tall pea plant is cross with a homozygous short pea plant?
Since a Tt heterozygous, tall plant produce with equal probabilities the gametes T and t, and the tt homozygous, short plant only t gametes, when they are crossed (Tt x tt) the progeny will be 50% tall (all genotypically Tt) and 50% short (all genotypically tt).
What happened when Mendel crossed tall pea plants with short pea plants?
Mendel took tall pea plants and short pea plants and produced F1 progeny through cross – fertilization.
What happened when Mendel crossed two traits of a character in a pea plant?
Answer: Mendel also experimented to see what would happen if plants with 2 or more pure-bred traits were cross-bred. He found that each trait was inherited independently of the other and produced its own 3:1 ratio. This is the principle of independent assortment .
When a pure tall plant is crossed with a short plant what will be the ratio of pure tall plant to short plant in F2 generation?
F2 Genotypic ratio =1 pure tall (TT) : 2 heterozygous tall (Tt) : 1 pure dwarf (tt); thus, the ratio of pure tall to pure short plants will be 1:1.
What trait in pea plants is being studied in the cross above?
Terms in this set (6)
What trait in pea plants is being studied in the cross shown above? The trait that is being studied is the height of the pea plants.
What Did Mendel’s cross-pollination of pea plants prove?
Mendel’s cross-pollination of pea plants proved that genes of two separate organisms are passed to their offspring.
How many traits in garden pea plants selected by Mendel for the genetics experiment were recessive?
There were 7 characters of the pea plant which were selected by Mendel for the experiments. The characters which were chosen by Mendel for his study were stem height, flower colour, flower position, pod shape, pod colour, seed shape, seed colour.
When two heterozygous tall pea plants are crossed what would the expected?
Biology Genetics Review
| Question | Answer |
|---|---|
| When two heterozygous tall pea plants are crossed, the expected genotype ratio of the offspring is _________________________. | 1:2:1 |
| An organism’s gametes have ____________________ the number of chromosomes found in the organism’s body cells. | half |
When a homozygous tall plant is crossed with a homozygous short all the offspring will be?
TT tt Make a cross between a HOMOZYGOUS TALL plant and a PURE SHORT plant. The offspring will have a 100% probability of having the genotype.
What is the result of a cross between a homozygous tall plant and a heterozygous tall plant?
Heterozygous tall (Tt) is crossed with homozygous tall (tt) to determine the dominant and recessive trait.
What happen when we cross the tall and dwarf varieties of garden pea?
A cross between pure breeding tall (TT) and dwarf (tt) plants produce all tall (Tt) plants in F1 progeny. These heterozygous tall plants produce 50% gametes with “T” allele and 50% with “t” allele. Random fusion of these gametes from two heterozygous tall plants gives tall and dwarf plants in 3:1 ratio.
Why are some pea plants tall and others short in nature explain with reference to the role of genes in controlling characteristics?
The pea plant will grow taller if the gene sequence is such that it creates a hormone that impacts the height attribute. If the gene sequence is in such a way that this hormone is only produced in little amounts and is controlled by specific conditions, it will have no effect on height growth. It will be a short plant.
What are the 7 pea plant traits?
On the next screen, he reveals that there are seven different traits:
- Pea shape (round or wrinkled)
- Pea color (green or yellow)
- Pod shape (constricted or inflated)
- Pod color (green or yellow)
- Flower color (purple or white)
- Plant size (tall or dwarf)
- Position of flowers (axial or terminal)
Which among the following characters selected by Mendel in a pea plant is a recessive character?
Complete answer: Green cotyledon colour was one of the recessive traits studied by Mendel in garden pea.
What happen when pea plant showing two different characteristics?
Answer. Answer: If the inheritance of more than one pair of characters is studied simultaneously the factors of genes for each pair of characters sort out independently.
Why did all of the F1 offspring of Mendel’s purple and white flowered pea cross always look like one of the two parental varieties?
Why did the F1 offspring of Mendel’s classic pea cross always look like one of the two parental varieties? One phenotype was completely dominant over another.
When a tall plant is crossed with a dwarf plant the ratio of pure tall and pure dwarf in F2 generation will be?
3 : 1 ratio
In F2 generation, the tall and dwarf plants will be produced in 3 : 1 ratio.
When a tall pea plant TT is crossed with dwarf plant TT What will be the phenotype in F2 generation?
The parents are homozygous tall (TT) and dwarf (tt), the progeny of the F1 generation will be hybrids (Tt). In the F2 generation, the tall and dwarf plants will be produced in 3 : 1 ratio. Out of the three tall plants, one tall plant will be homozygous tall (TT) and two tall plants will be heterozygous tall (Tt).
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