11. mendel predicted that there are “units of heredity” which we now call 12. a version or variant of a gene that produces a specific trait is called an 13. a recessive phenotype can only be displayed if the genotype is heterozygous. 14. the chromosomes that underwent during meiosis are called recombinant chromosomes, because they contain a region that has recombined to form a new pair of alleles. 15. when genes do not assort independently, the genes are said to be on the same part of the chromosome so they get passed on together. 16. a is a segment of dna on a chromosome that codes for a particular trait. 17. most sex-linked genes are on chromosome, simply because they are built of much more dna. however, are more likely than to exhibit sex-linked traits.