Afemale fly is heterozygous for three x-linked genes. the dominant alleles are abc and the recessive alleles are abc. she is crossed with an abc/y male. the following progeny phenotypes are produced. these phenotypes are equally divided between male and female flies. abc 420 abc 435 abc 55 abc 60 abc 14 abc 16 approximately how many double crossovers progeny would you have expected to see in the total of 1,000?

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

Which is not true about balanced forces?