Biology

Biology, 16.10.2019 14:30, terryjessicaa

Do males of all sexual species have y chromosomes?

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Biology, 05.07.2019 17:30, stodd9503

1. in a population of birds, females begin choosing males with slightly greener feathers than themselves. if intersexual selection progresses in this species, this will likely result in: strong intra-sexual competition for females by males the decrease in resources available for females relative to males drastic sexual dimorphism where males will exhibit bright green feathers and females will remain drab strong intra-sexual competition for males by females 2. which of these is an example of a fixed action pattern? many species of lizards will re-grow their tails after tail-loss. many bird species will sing the same songs that they learn from their parents shortly after birth. prairie dogs will stop sounding an alarm call after learning that a predicted threat is not actually a threat. greylag geese will continue to attempt to roll an imaginary displaced egg back into the nest even if the egg is removed from the nest site. 3. in beehives, like this one, each of the workers making honey for the queen and the larva are offspring of the queen and share genetic material. according to the theory of inclusive fitness, when environmentally induced cannibalistic tadpoles are produced by spade foot toads, what is most likely to occur?

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Biology, 04.08.2019 06:20, arambpri2636

Myrmecia pilosula actually consists of several virtually identical, closely related species of ants, with females having chromosome numbers of 18, 20, 32, 48, 60, 62, and 64. the males are haploid, and each gamete contains the n complement. assume one crossed a female of species (a) with 32 chromosomes and a male species (b) with 9 chromosomes. how many chromosomes would one expect in the body (somatic) cells of the female offspring

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Biology, 04.08.2019 23:20, dudeper40

An interesting group of ants consists of several virtually identical, closely related species, with females having chromosome numbers of 18, 20, 32, 48, 60, 62, and 64. if one crossed a female of species (a) with 32 chromosomes and a male species (b) with 9 chromosomes (males are haploid, and each gamete contains the n complement), how many chromosomes would one expect in the body (somatic) cells of the female offspring

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Biology, 27.09.2019 08:30, keananashville

Which best describes the sex chromosomes in humans? a.females have one x and one y chromosome. b.males have two y chromosomes. c.males have two different chromosomes. d.males have two x chromosomes.

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