You cross homozygous spherical, heterozygous yellow plant with a dented green plant. How many do you expect from an offspring of 100 should be spherical and yellow
Need more data. What genes are dominant or recessive?
To predict the number of spherical and yellow offspring from a cross between a homozygous spherical, heterozygous yellow plant (SSYy) and a dented green plant (ssyy), we need to consider the principles of Mendelian genetics.
First, we need to determine the gametes the parents can produce:
For the homozygous spherical, heterozygous yellow plant (SSYy):
- It can produce two types of gametes: SY and Sy.
For the dented green plant (ssyy):
- It can produce two types of gametes: sy.
Now, we can set up a Punnett square to analyze the possible combinations of these gametes:
| S s
------------------
Y | SY Sy
y | SY Sy
In the Punnett square, we can see that there are four possible combinations of gametes produced by the parents: SY, Sy, SY, and Sy.
Now, we can determine the phenotypes (observable traits) of the offspring produced from these gametes:
- SY: Spherical and yellow
- Sy: Spherical and yellow
- SY: Spherical and yellow
- Sy: Spherical and yellow
So, all the possible combinations result in spherical and yellow offspring.
If we consider 100 offspring, we can expect all of them to be spherical and yellow.
Therefore, you can expect all 100 offspring to be spherical and yellow.