Answer:
Allele of offspring determines the allele donated by both the parents and if the genotype of one parent is known, then the genotype of the second parent could be determined easily. This is how Fred's genotype could be determined.
Explanation:
Please see the attachment
The branch of biology which deals with genes and inheritance is called genetics. There are two types of genes present, these genes are as follows:-
These genes are responsible for the formation of hormones and protein in the human body.
To know the genes of the unknown dominant, we must use the test cross.
In a test cross, the recessive plant is crossed with the unknown dominant plant to know its genotypes.
Hence, test cross could help to determine the fred's genotype
For more information, refer to the link:-
https://brainly.com/question/1371855
