Biology and Genetics
101624 questions • Page 1630 / 2033
Two pea plants heterozygous for the characters of pod color and pod shape are cr
Two pea plants heterozygous for the characters of pod color and pod shape are crossed. Draw a Punnett square to determine the phenotypic ratios of the offspring. A man with type A…
Two pea plants with purple flowers are crossed. Among the offspring, 63 have pur
Two pea plants with purple flowers are crossed. Among the offspring, 63 have purple flowers, and 17 have white flowers. With a chi-square test, compare the observed numbers with a…
Two people heterozygous for Tay-Sachs (Tt) have two children who are both normal
Two people heterozygous for Tay-Sachs (Tt) have two children who are both normal, but carriers (Tt).Tay-Sachs is a recessively inherited disease.What is the percent (%) chance the…
Two pepti the peptide sample was completely degraded after four cycles of Edman
Two pepti the peptide sample was completely degraded after four cycles of Edman degradation. In the second method, three florescent dansylamino acids were chloride followed by tre…
Two peptide samples of the same sequence were degraded using two different metho
Two peptide samples of the same sequence were degraded using two different methods. In first method, the peptide sample was completely degraded after four cycles of Edman degradat…
Two petri dishes of radish seeds are prepared as follows: a disk of absorbent, b
Two petri dishes of radish seeds are prepared as follows: a disk of absorbent, but otherwise inert, filter paper is placed in the bottom of each dish and 5 mL of distilled water a…
Two petri dishes of radish seeds are prepared as follows: a disk of absorbent, b
Two petri dishes of radish seeds are prepared as follows: a disk of absorbent, but otherwise inert, filter paper is placed in the bottom of each dish and 5 mL of distilled water a…
Two phenotypes appear in an experiment in the ratio 16: 4 (a) How well does this
Two phenotypes appear in an experiment in the ratio 16: 4 (a) How well does this sample fit a 3:1 ratio? Would a sample with the same proportional deviation fit a 3:1 ratio if it …
Two phenotypes are found for the cuteness trait, cute (C) which is dominant to e
Two phenotypes are found for the cuteness trait, cute (C) which is dominant to extreme cute (c). You have a cute Stevious whose mother was extreme cute. Determine the number of co…
Two plane mirrors stand facing each other, 3.20 m apart, and a woman stands betw
Two plane mirrors stand facing each other, 3.20 m apart, and a woman stands between them. The woman faces one of the mirrors from a distance of 1.40 m and holds her left arm out t…
Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular
Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This suggests A) that the parents were true-breeding for contrasting traits. B) incomplete …
Two plants are heterozygous for two gene pairs (Ab/aB) whose loci are linked 25
Two plants are heterozygous for two gene pairs (Ab/aB) whose loci are linked 25 mu apart. Assuming crossover occurs during the formation of both male and female gametes and the A …
Two point charges lie on the x axis. A charge of 6.5 C is at the origin, and a c
Two point charges lie on the x axis. A charge of 6.5 C is at the origin, and a charge of -9.5 C is at x=10.0cm. Part A What is the net electric field at x=4.0cm? Express your answ…
Two point charges, Q 1 = -5.3 C and Q 2 = 2.2 C , are located between two opposi
Two point charges, Q1 = -5.3 C andQ2 = 2.2 C , are located between two oppositely charged parallel plates, as shown in (Figure 1) . The two charges are separated by a distance ofx…
Two points: In cats, color of the fur is X-linked. Black hair is dominant (B),or
Two points: In cats, color of the fur is X-linked. Black hair is dominant (B),orange hair is recessive (b) and the calico cat results from being heterozygous. You find a calico mo…
Two populations can be very divergent from one another, yet still have evolved n
Two populations can be very divergent from one another, yet still have evolved no reproductive isolating mechanisms. True False The effects of genetic drift can cause speciation i…
Two populations of a fly are isolated from all other populations. Population S l
Two populations of a fly are isolated from all other populations. Population S lives on a very small island and has a population size of 103individuals. Population L lives on a co…
Two populations of a species of falcons that were inbred in captivity have diffe
Two populations of a species of falcons that were inbred in captivity have different mean wingspans of 56 and 88 centimeters. The two populations were crossed and the mean and sta…
Two populations of antelope are separated by a mountain range. It is known that
Two populations of antelope are separated by a mountain range. It is known that the antelope may occasionally migrate from one population to the other. Migration can occur in eith…
Two populations of antelope are separated by a mountain range. It is known that
Two populations of antelope are separated by a mountain range. It is known that the antelope may occasionally migrate from one population to the other. Migration can occur in eith…
Two populations of antelope are separated by a mountain range. It is known that
Two populations of antelope are separated by a mountain range. It is known that the antelope may occasionally migrate from one population to the other. Migration can occur in eith…
Two populations of birds (one in California, the other in Virginia) appear diffe
Two populations of birds (one in California, the other in Virginia) appear different from one another with respect to their pattern of coloration, wing shape, and body size. Howev…
Two populations of birds with somewhat different coloration live on opposite sid
Two populations of birds with somewhat different coloration live on opposite sides of a peninsula. The habitat between the populations is not suitable for these birds. When birds …
Two populations of lizards (same species) are located on different islands. Thes
Two populations of lizards (same species) are located on different islands. These lizards are not very good swimmers. The lizards on island A all have either gray or green skin, w…
Two populations of mountain lions, each in Hardy-Weinberg equilibrium, were sepa
Two populations of mountain lions, each in Hardy-Weinberg equilibrium, were separated by a river. The population on the west side of the river was too large to count and the popul…
Two potentially serious bacterial diseases are Rocky Mountain Spotted Fever (RMS
Two potentially serious bacterial diseases are Rocky Mountain Spotted Fever (RMSF) and cholera. (a) What is the causative agent of RMSF? In your own words, give a description of t…
Two probes designated probe A and probe B hybridize very near one another in a r
Two probes designated probe A and probe B hybridize very near one another in a region of DNA that contains DNA fragment length variation when digested with the restriction enzyme …
Two protein kinases, K1 and K2, function sequentially in an intracellular signal
Two protein kinases, K1 and K2, function sequentially in an intracellular signaling cascade. If either kinase contains a mutation that permanently inactivates its function, no res…
Two proteins (I and II), MWr 30,000, are isolated from homologous cells of close
Two proteins (I and II), MWr 30,000, are isolated from homologous cells of closely related organisms, and their primary structure determined. The primary structure of protein I is…
Two proteins (X and Y) differ significantly in their pI values derived based on
Two proteins (X and Y) differ significantly in their pI values derived based on their amino acid sequence. Protein X has a pI of 8 and protein Y has a pI of 4. a) What is the func…
Two proteins (blue shapes below) dimerize with each other in a non-covalent mann
Two proteins (blue shapes below) dimerize with each other in a non-covalent manner (amino acids listed below, bonds are shown as dotted blue lines) to create a quaternary structur…
Two proteins A and B were run on two separate 12% polyacrylamide gels (pH-8.8) i
Two proteins A and B were run on two separate 12% polyacrylamide gels (pH-8.8) in the presence or the absence of SDS. In the absence of SDS, the two proteins migrate at the same p…
Two proteins are said to be homologous if they: A. Have the same function in dif
Two proteins are said to be homologous if they: A. Have the same function in different organisms B. Share a significant degree of sequence similarity C. Share a significant degree…
Two proteins are said to be homologous if they: A. Have the same function in dif
Two proteins are said to be homologous if they: A. Have the same function in different organisms B. Share a significant degree of sequence similarity C. Share a significant degree…
Two proteins have been purified by a researcher, called Bucky A and Bucky B. She
Two proteins have been purified by a researcher, called Bucky A and Bucky B. She determines the extinction coefficient for each, generating the following information: 5. (3 points…
Two proteins in encoded by the E. coli lac operon are needed to metabolizes the
Two proteins in encoded by the E. coli lac operon are needed to metabolizes the sugar lactose: the lactose permease (encoded bythe gene lacY) and the enzyme B-galactosidase (encod…
Two proteins, dissolved in an aqueous buffer, interact by forming ion bonds betw
Two proteins, dissolved in an aqueous buffer, interact by forming ion bonds between four negatively charged amino acid residues and four positively charged amino acid residues. Wh…
Two protons each of mass 1.67 times 10^-2 kg and charge e are initially at rest
Two protons each of mass 1.67 times 10^-2 kg and charge e are initially at rest separated by 1.0 times 10^-14 m (approximately the radius of a nucleus). When released, the protons…
Two pure breeding lines of Klingon mice which differ in head type and fang lengt
Two pure breeding lines of Klingon mice which differ in head type and fang length are crossed to produce F1 offspring. F1 individuals are crossed to produce F2 offspring. The F2 o…
Two pure breeding lines of Klingon mice which differ in head type and fang lengt
Two pure breeding lines of Klingon mice which differ in head type and fang length are crossed to produce F1 offspring. F1 individuals are crossed to produce F2 offspring. The F2 o…
Two pure breeding lines of corn with short and long seed length are crossed to p
Two pure breeding lines of corn with short and long seed length are crossed to produce and Fl which is allowed to self fertilize to produce an F2. The distribution of the seed len…
Two pure breeding plants with the genotypes ddPP and DDpp are crossed together t
Two pure breeding plants with the genotypes ddPP and DDpp are crossed together to generate F1 progeny with the genotype DdPp. F1 individuals were testcrossed to a homozygous paren…
Two pure line of tomato were crossed. Line 1 had red fruit (R) and yellow flower
Two pure line of tomato were crossed. Line 1 had red fruit (R) and yellow flowers (Wf), line 2 had yellow (r) fruit and white (wf) flowers. The F1 had red fruit and yellow flowers…
Two pure strains of corn with white kernels were crossed. All the F1 progeny had
Two pure strains of corn with white kernels were crossed. All the F1 progeny had red kernels; the F2 progeny consisted of 91 red and 69 white. Explain the inheritance of pattern f…
Two pure-breeding wheat strains, one producing dark red kernels and the other pr
Two pure-breeding wheat strains, one producing dark red kernels and the other producing white kernels, are crossed to produce F1 with pink kernel color. When an F1 plant is self-f…
Two red-eyed, long-winged fruit flies were bred together andproduced the followi
Two red-eyed, long-winged fruit flies were bred together andproduced the following offspring: females: 3/4 red eyed and long winged, 1/4red eyed and vestigial winged males: 3/8 re…
Two related but distinct neurological disorders are Prader-Willi syndrome (PWS)
Two related but distinct neurological disorders are Prader-Willi syndrome (PWS) and Angelman syndrome (AS). Children with PWS are obese, have weak muscle tone, and delayed develop…
Two remote, islands in the Pacific are uninhabited by humans. Both have populati
Two remote, islands in the Pacific are uninhabited by humans. Both have populations of wild boars. On Island A, all of the animals share the same coloration and snout appearance, …
Two researchers are conducting a randomized control trial on a new treatment for
Two researchers are conducting a randomized control trial on a new treatment for weight loss. They have a target population of 50,000 adults, to which they have access to 5,000 of…
Two rivers 1000 m apart penetrate a confined aquifer 20 m thick. The hydraulic c
Two rivers 1000 m apart penetrate a confined aquifer 20 m thick. The hydraulic conductivity of the aquifer is 20 m/day. The stages of the two rivers are 500 m and 495 m above sea …
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