A testcross consists of a cross
a. of two pure-breeding forms to find out which
form of a gene is dominant.
b. between two unknown forms to determine their
genotypes.
c. between an offspring and its homozygous
dominant parent.
d. of an organism of dominant phenotype but
unknown genotype to an individual that is
homozygous recessive for that trait.
e. of two F2 individuals to produce an F3
generation.
Answer: d
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