Question

give me the charecterstics of bombyx mori

Answer 1

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phylum: Bombyx mori(silk worm)

The abult silk moth is about 2.5cm long with two

pair of wings, it is creamy white in colour.

- The body is divisible into head, thorase and abdomens

is covered by minute scales

- silk wooms are unisexual female moth lays three to !

five hundsead eggs in clustens upon the leaves of

muberry

- the lave undergoes four mouties and then stop

feeding it secretes a sticky fluid through its spinner

ets, which on coming in contact with ais become silk

thread and remains wrapped around its body to foon

Pupa.

Thelifecycle of the moth comprise of pour lages.

Egg laova pupa - adult pupa hatchintoadult.

Answer 2

Answer:

The domesticated or mulberry silkworm, Bombyx mori, is the second best-studied insect genetic model after the fruit fly, Drosophila melanogaster. Its relatively large size (up to 5 g per mature last stage larva), fecundity (200–400 eggs per female), and reasonably short life cycle (2 months), together with the ability to rear thousands of insects en masse, present experimental advantages that have been exploited for basic research in parallel with its use in agriculture for silk production. Two major types of genetic resources have been developed for the silkworm: (1) stocks carrying a wide variety of classic Mendelian mutations (more than 450 described) and radiation-induced chromosome aberrations which have been used to study fundamental biological processes, such as biochemistry, development, physiology, hormone action, sex determination, virus infection, radiation sensitivity, and feeding behavior; and (2) hundreds of inbred strains that differ in economic traits such as silk yield and quality, growth rate, fecundity, fertility, disease resistance, and tolerance to seasonal variation in rearing conditions, which are used for practical breeding. The practical breeding strains have been the source of many of the spontaneous mutations in present stock collections; however, their potential as sources of quantitative trait loci (QTL), genes affecting complex or polygenic traits, is just beginning to be exploited. A third source of genetic variation is Bombyx mandarina, the putative wild ancestor of the silkworm which can be found in mulberry fields (the main food source for both species) in Southeast Asia (Japan, Korea, and China). Despite a difference in chromosome number between most extant populations of B. mandarina (n=27) and B. mori (n=28), the two species are interfertile. Thus, the wild silkmoth has been the source of many larval and adult color variants as well as, more recently, distinctive behavioral traits by introgression into the domesticated species.