Final answer:
The correct gene combination from the replication products of the maternal chromosome, considering chromosomal linkage and the possibility of recombination during meiosis, would be AB and ab if the genes are linked, and could include Ab and aB if recombination occurs.
The correct answer is options (a) AB and aB.
Step-by-step explanation:
The question asked is related to genetics, specifically the concept of chromosomal linkage and the production of gametes through meiosis. In the context of a heterozygous individual with dominant alleles AB on a maternal chromosome and recessive alleles ab on a paternal chromosome, gametes would be produced with the combinations AB or ab if the genes are linked. This is because linked genes tend to be inherited together. However, if there is recombination during meiosis, which can occur between linked genes, new combinations of alleles can be produced, such as Ab and aB.
For a heterozygous individual with genotype AaBb, the types of gametes that can be produced, if the genes are unlinked, are AB, Ab, aB, and ab. Furthermore, in the context of ABO blood groups, the AB type demonstrates codominance where both alleles A and B are equally expressed.
The correct answer is options (a) AB and aB.