The fruit fly drosophila melanogaster has a haploid chromosome number of n = 4, and 2n = 8. chromosome iv in this species is a tiny autosome. flies trisomic for chromosome iv are fertile and have no apparent defects. the eyeless (ey) and gawky (gw) loci are tightly linked on chromosome iv. loss-of-function ey− and gw− alleles are recessive to ey and gw, respectively. flies homozygous for ey− lack eyes, and flies homozygous for gw− have disrupted circadian rhythms. consider a male fly trisomic for chromosome iv, with each of the three chromosome copies bearing different allele combinations for these two loci: if this trisomic fly is the progeny of a male fly of genotype (ey+ ey−, gw+ gw−) crossed to a female fly with genotype (ey− ey−, gw− gw−), what can you conclude about the events that led to its formation? (3 points) a. nondisjunction occurred in the female parent at the meiosis i division to produce an (n+1) egg that fused with a normal (n) sperm. b. nondisjunction occurred in the male parent at the meiosis ii division to produce an (n+1) sperm that fused with a normal (n) egg. c. nondisjunction occurred in the female parent at the meiosis ii division to produce an (n+1) egg that fused with a normal (n) sperm. d. nondisjunction occurred in the male parent at the meiosis i division to produce an (n+1) sperm that fused with a normal (n) egg.
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Biology, 21.06.2019 20:20, gabbee
Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?
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Biology, 22.06.2019 02:20, bennettaly2452
The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions
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The fruit fly drosophila melanogaster has a haploid chromosome number of n = 4, and 2n = 8. chromoso...
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