Biology, 28.02.2020 22:26 dfrtgyuhijfghj4794
Primary spermatocytes are diploid (2n) cells with all of the organelles typically found in eukaryotic animal cells. Spermatogenesis begins with a primary spermatocyte with 6 chromosomes, which undergoes meiosis 1 to produce two secondary spermatocytes with 3 chromosomes in each. Each of the secondary spermatocytes undergoes meiosis 2 to produce 2 spermatids, with 3 chromosomes in each. The 4 spermatids mature into spermatozoa.
(a) Describe the process in meiosis that ensures that both maternal and paternal chromosomes are passed on to each spermatozoon.
(b) Explain why the genetic content of individual chromosomes in a spermatozoon most likely differs from the genetic content of individual chromosomes in a primary spermatocyte.
(c) In some instances, meiosis of a primary spermatocyte with six chromosomes results in two spermatozoa that contain four chromosomes and two spermatozoa that contain two chromosomes. Predict the most likely cause.
Answers: 2
Biology, 22.06.2019 03:30
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Answers: 1
Biology, 22.06.2019 04:00
Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.
Answers: 2
Biology, 22.06.2019 13:30
Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases
Answers: 1
Primary spermatocytes are diploid (2n) cells with all of the organelles typically found in eukaryoti...
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