Two heterozygous purple-stemmed plants are grown. Each parent has the genotype ANL/anl. Pollen from one of the plants is used to pollinate the other, and the resulting seeds are harvested. What traits would you expect in the plants grown from these seeds?
ani/ani is the wild type, and shows no purple. The A gene shows purple
a/A x a/A yeilds aa, aA, A/a,AA or three purple to one non purple. The a/A show varying degrees o purple
To determine the traits expected in the plants grown from the seeds, we need to understand the inheritance pattern of the traits in question. In this case, we are considering the stem color trait, which is determined by the genes ANL and anl.
The genotype ANL represents a dominant allele for purple stem color, while anl represents a recessive allele for green stem color. Heterozygous plants have one dominant and one recessive allele (ANL/anl), and the dominant allele typically determines the observable trait.
When two heterozygous plants (ANL/anl) are crossed, the Punnett square can be used to predict the offspring's possible traits. The Punnett square for this cross would look like:
| ANL | anl |
-------------------------
ANL | ANL | anl |
-------------------------
anl | ANL | anl |
From the Punnett square, we see that there are three possible genotypes in the offspring: ANL/ANL, ANL/anl, and anl/anl. However, only the ANL/ANL and ANL/anl genotypes will show the purple stem trait, as the dominant allele (ANL) determines the stem color.
Therefore, the expected traits in the plants grown from these seeds would be a mixture of purple-stemmed plants (ANL/ANL) and green-stemmed plants (ANL/anl), with no plants having the recessive genotype for green stem color (anl/anl).
To determine the traits in the plants grown from these seeds, we need to understand the principles of inheritance and Punnett squares.
First, let's break down the information given:
- Both parent plants are heterozygous for the stem color trait, with genotypes ANL/anl.
- Purple stem color (ANL) is dominant, and white stem color (anl) is recessive.
To predict the traits of the plants grown from these seeds, we can use a Punnett square. A Punnett square is a grid used to visualize the possible combinations of alleles from the parents.
In this case, the genotype of the first parent is ANL/anl, and the genotype of the second parent is also ANL/anl. Here's how you can set up a Punnett square to determine the potential genotypes and phenotypes:
| A N L | a n l |
-------|---------------------------
A | AA AN AL | aA aN aL |
N | AN NN NL | aN nn nL |
L | AL NL LL | aL nL LL |
By combining the alleles from both parents, we can see the potential genotypes and phenotypes of the offspring. Here are the results:
- Genotypes: In the Punnett square, you can see various combinations of alleles. There are three possible genotypes: ANL, ANl, and aNl.
- Phenotypes: The phenotype of an organism is its observable trait. Since purple stem color (ANL) is dominant over white stem color (anl), the plants with genotypes ANL and ANl will both exhibit purple stem color.
Therefore, the plants grown from these seeds would be expected to have a mixture of plants with purple-stemmed plants, resulting from the dominant allele (ANL) inherited from either parent.