Most organisms display a circadian rhythm, in which biological processes are syn

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Most organisms display a circadian rhythm, in which biological processes are synchronized with day length (e.g., in humans, rapid movement between time zones results in jet lag, in which established circadian rhythms are out of sync with daylight hours). In Drosophila, pupae eclose (emerge as adults after metamorphosis) at dawn Part A Using this knowledge, how would you screen for Drosophila mutants that have an impaired circadian rhythm? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Terms can be used once, more than once, or not at all Reset Help dawn as the mutant phenotype, it is possible to conduct an F3 screen for Using eclosion at recessive mutations that affect the time pupae eclose. Male flies fed EMS to induce mutations and then mated to females containing the db allele and the dominant marker, CyO, which causes curly wings. Individual F1 males that have from the chromosome 3 balancer strain to create many independent F2 lines. F2 progeny with dusk for dark body (db) are daytime for a balancer chromosome 3 times other than dawn wings and bodies are selected and mated back to a female homozygous heterozygous hemizygous wings and bodies will be heterozygous for the new mutations Interbreeding the F2 will create many independent F3 populations. If the F2 were heterozygous for a cur circadian rhythm mutation, about one-third of the progeny would eclose at straight dark light Submit vious Answers Request Answer

Explanation / Answer

homozygous

heterozygous

curly

dark

curly

dark

homozygous

heterozygous

straight

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