do drosophila have barr bodies?
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In Drosophila, there is no Barr body equiva- lent. Furthermore, two lines of evidence indicate that both X chromosomes are simultaneously active in cells of the female soma.
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The truth is that fruit flies (or Drosophila melanogaster, as they are scientifically named) are stealthy little guys that seem to smell rotting fruit from miles away. They don't come from inside the fruit, but rather come from outside once the fruit on your kitchen counter starts to go just past ripe.
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The adult flies are about 3/4” long, and are shiny black, looking more like a wasp than a house fly. However, these are not a pest or nuisance fly since they have no functioning mouth parts and therefore cannot bite, nor do they have a stinging mechanism.
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Drosophila melanogaster lives in a wide range of habitats. Native habitats include those in the tropical regions of the Old World, but the common fruit fly has been introduced to almost all temperate regions of the world.
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They have an extra set of wings, but they can't fly worth squat. These notoriously lame flyers actually have two sets of wings. Only one of those pairs provides what scientists call lift. Given their manic attraction to light (see Fact #1), June bugs quickly exhaust themselves.
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The most simple characteristic to use to differentiate the two is to look at the genitalia of the flies. Males have dark, rounded genitalia at the tip of their abdomen, whereas females have light, pointed genitalia.
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Drosophila genome is 60% homologous to that of humans, less redundant, and about 75% of the genes responsible for human diseases have homologs in flies (Ugur et al., 2016).
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Flesh flies are remarkably large flies with three black stripes on their thorax. They have thick gray bodies. They have bright red eyes which makes them easier to identify.
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Insects have exoskeletons (skeletons on the outside). Their skeletons are made out of thin, hard pieces or plates, like armour, made of chitin. All together, these pieces make a hard layer around the insect's body. The exoskeleton protects the insect.
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Gene Linkage As it turns out, Drosophila has four linkage groups and four pairs of chromosomes.
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Roundworms (Nematoda) and rotifers (Rotifera) have a body cavity (coelom) where organs are found and that can serve as a hydrostatic skeleton. Their coelom is called a pseudocoelom because it is not completely lined by mesoderm. ... They have a true coelom that is completely lined by the mesoderm layer.
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Notice the curled wings of these flies. They have a defect in their "curly gene," which is on the second chromosome. Having curled wings is a dominant mutation, which means that only one copy of the gene has to be altered to produce the defect. In fact, if both copies are mutated, the flies do not survive.
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Arthropods are invertebrates with segmented bodies and jointed limbs. The exoskeleton or cuticles consists of chitin, a polymer of glucosamine.
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Simple invertebrates, such as Daphnia, do not have lungs or red blood cells. Because Daphnia do not have a complex respiratory system, they generally obtain oxygen for respiration through diffusion. ... Hemoglobin in these organisms is extracellular and helps to carry oxygen to body tissues.
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Tiny white worms, almost transparent, that will ultimately blossom into fruit flies -- unless you eat them first. Scientists know them as Drosophila suzukii. Before we go on, we should tell you to stop gagging, because they are safe to eat. (Also, protein.)
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Like all arthropods, they have a segmented body and segmented limbs and a thick chitinous cuticle called an exoskeleton. Chelicerates have two body segments; a cephalothorax and an abdomen. They have no antennae, but have six pairs of appendages.
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Fruit fly body cells have 8 chromosomes. After meiosis, you would expect a resulting fruit fly daughter cell to have ... 16 chromosomes. 46 chromosomes.