MCQ
A test cross is carried out to:
- ADetermine the genotype of a plant at F2.
- BPredict whether two traits are linked.
- CAssess the number of alleles of a gene.
- DDetermine whether two species or varieties breed successfully.
Explanation:
Test cross is the crossing of an F1 progeny with a homozygous recessive parental progeny is done in order to determine whether the progeny is homozygous or heterozygous for a character under consideration. This is called a test cross.
Those that are heterozygous will have one dominant and one recessive allele individuals and those that are homozygous dominant will have two dominant alleles, and those that are homozygous recessive will have two recessive alleles.
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$II.$ If a foreign $DNA$ ligates at the Bam Hl site oftetracycline resistance gene in the vector $pBR322$, the recombinant plasmid loses the tetracycline resistance due to insertion offoreign $DNA$.
Choose regarding the above statements.