Exam 13: Chromosomal Rearrangements and Changes in Chromosome Number

Wild oysters are diploid and have 20 chromosomes in somatic cells. Scientists have generated tetraploid oysters using colchicine to prevent separation of sister chromatids. Crossing a diploid oyster with a tetraploid oyster resulted in triploid oysters that are commercially advantageous because they are larger and do not have a reproductive phase that usually interrupts the harvesting season. -What is n in wild oysters?

Which is not an example of euploidy?

What is true in translocation heterozygotes?

Which of the following chromosomal rearrangements usually results in normal meiosis?

Which is a characteristic of retrotransposons, but not of DNA transposons?

Wild oysters are diploid and have 20 chromosomes in somatic cells. Scientists have generated tetraploid oysters using colchicine to prevent separation of sister chromatids. Crossing a diploid oyster with a tetraploid oyster resulted in triploid oysters that are commercially advantageous because they are larger and do not have a reproductive phase that usually interrupts the harvesting season. -What is the probability that a gamete produced by a triploid oyster will be balanced?

Which process can cause duplications? (Select all that apply. )

Deletions are most useful for gene mapping

In a deletion heterozygote, the normal chromosome will form what structure during prophase of meiosis I?

One similarity between DNA transposons and retrotransposons is that

What are the four major classes of chromosomal rearrangements?

In what way can defective transposable elements alter genomes even if they cannot mobilize? (Select all that apply. )

An individual with which type of chromosomal rearrangement is expected to have the lowest fertility?

When a crossover occurs within the inversion loop of a pericentric inversion, each recombinant chromatid will have (Select all that apply. )

What is the movement of part of one chromosome to another chromosome called?

Karyotypes generally remain constant within a species because

Triticale is an allopolyploid hybrid between wheat and rye.Some strains of Triticale show agricultural promise because (Select all that apply. )

FISH analysis is likely to detect which type of change in DNA? (Select all that apply. )

Despite selection against chromosomal variations,

What type of mutation adds material to the genome?