Biology, 20.12.2019 05:31, queenjanet46
Two highly inbred tobacco plants are crossed. one has dark green leaves. the other has yellow leaves. the f1 have light green leaves. five hundred progeny from f1 × f1 crosses are analyzed. their leaves show continuous variation in color, but none has dark green or yellow leaves. what do these data suggest about the number of genes determining this trait?
a) there are two genes that determine this trait.
b) there are more than four genes that determine this trait.
c) there are three genes that determine this trait.
d) there are four genes that determine this trait.
e) there is not enough information to estimate the number of genes.
Answers: 3
Biology, 22.06.2019 00:00, mya032
Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i. e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.
Answers: 3
Biology, 22.06.2019 18:00, rbrummitt6922
Does all the energy stored by the phytoplankton reach the top level of the pyramid
Answers: 1
Biology, 22.06.2019 22:30, Tcmidian3644
In the figure below, which letter points to the structure through which water is lost during transpiration?
Answers: 3
Two highly inbred tobacco plants are crossed. one has dark green leaves. the other has yellow leaves...
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