Answer :
True. When considering linked genes, you can identify the parental gametes in a test cross by finding the most frequent gametes.
Following genes on the same chromosomes can result in two types of gametes. If there is no crossing over, the products are parental gametes. Recombinant gametes are the result of crossing over.
When genes are on different chromosomes or are very close together on the same chromosome, they assort independently. That is, when the genes are expressed in gametes, the allele for one gene has no effect on the allele for the other. This results in the formation of all 444 possible types of gametes with equal, or 25%, frequency in a double heterozygous organism (AaBb).
Rather than assorting independently, the genes "stick together" during meiosis. That is, alleles of genes that are already present on a chromosome will tend to be passed on to gametes as a unit. The genes are linked in this case.
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