Question

In: Biology

22. Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants, and none of the resulting offspring...

22. Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants, and none of the resulting offspring produced purple flowers. The allele for purple flowers is ____________.

a.   dominant

b.   monohybrid

c.   independent

d.   recessive

e.   segregated

23. An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. If an individual with wavy hair mates with another individual with wavy hair, what is the probability that their child will have (naturally) curly hair?

a.   25%

b.   100%

c.   0%

d.   50%

e.   75%
24. Which of the following is characteristic of a DNA double helix?
   a.   The amount of adenine is equal to the amount of guanine, and the amount of thymine is equal to the amount of cytosine.
   b.   The amount of adenine is equal to the amount of uracil, and the amount of guanine is equal to the amount of cytosine.
   c.   The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine.
   d.   The amount of adenine is equal to the amount of cytosine, and the amount of guanine is equal to the amount of thymine.
   e.   The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of uracil.

25. If a strand of DNA has the sequence CCGTCT, transcription will result in a(n) ______.

a.   single RNA strand with the sequence GGCAGA

b.   single RNA strand with the sequence CCGUCU

c.   single DNA strand with the sequence TTCGAG

d.   single RNA strand with the sequence GGCUGAU

e.   RNA double helix with the sequence UUCGAG for one strand and AAGCUC for the complimentary strand

26. If one strand of a DNA double helix has the sequence ATCGCA, what is the sequence of the other strand?

a.   ATCGCA

b.   TAGCGT

c.   TACGCT

d.   AUCGCA

e.   UAGCGU
27. Organisms carrying genes from another species are called

a.   cancerous

b.   vectors

c.   transformed

d.   transgenic

e.   hybrids

28. In a DNA double helix, adenine pairs with ______ and guanine pairs with ______.

a.   guanine . . . adenine

b.   uracil . . . cytosine

c.   thymine . . . cytosine

d.   cytosine . . . thymine

e.   cytosine . . . uracil

29. RNA contains ______, whereas DNA contains ______.

a.   adenine . . . guanine

b.   cytosine . . . guanine

c.   nucleotides . . . nucleic acids

d.   uracil . . . thymine

e.   a deoxyribose sugar . . . a ribose sugar
30. Where is translation accomplished?

a.   nucleoli

b.   sER

c.   lysosomes

d.   ribosomes

e.   peroxisomes

31. DNA and RNA are polymers of ______.

a.   fatty acids

b.   nucleotides

c.   monoglycerides

d.   amino acids

e.   monosaccharides

Solutions

Expert Solution

Q.22 ) . Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants, and none of the resulting offspring produced purple flowers. The allele for purple flowers is

Answer 22) d.   Recessive

Explanation : The true breeding plants means they are homozygous for the particular allele. The offspring produced from the above cross will be heterozygous and they will be expressing the dominant character only, since all the offspring are showing white-flowered plants as the purple flowered character is not expressed, we can say that the purple flowers is a recessive character which will not express itself if the allele for dominant character is present along with it.

Q.23. An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. If an individual with wavy hair mates with another individual with wavy hair, what is the probability that their child will have (naturally) curly hair?

Answer 23) c.   0%

Explanation : The offspring of curly hair individual and straight hair individual are having wavy hair that means both the characters are showing incomplete dominance i.e. both the characters are partially expressed in the offspring. If we take the allele for curly hair as ‘C’ and for straight hair as ‘S’ then the genotype of the wavy hair individuals will be ‘CS’ , if the cross is between two such individuals then none of the offspring will have curly hair or straight hair

gamates

C

S

C

CS

Wavy hair

CS

Wavy hair

S

CS

Wavy hair

CS

Wavy hair

Q.24). Which of the following is characteristic of a DNA double helix?

Answer.24) c.   The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine.

Explanation: A single DNA molecule has two antiparallel strands, each of the strands are made up of series of nucleotides, these nucleotides have different types of nitrogen bases. The two strands of DNA are connected to each other by the pairing between these nitrogen bases with the help of hydrogen bonds. The pairing of nitrogen bases is complementary i.e. Adenine always pairs with thymine and vice versa. Guanine always pairs with cytosine and vice versa. Hence the amount of adenine will be always equal to the amount of thymine and amount of guanine will be always equal to the amount of cytosine.

Note: Uracil is also a nitrogen base which pairs with adenine, but it is present in RNA i.e. in RNA, thymine is replaced by Uracil.

Q.25 ). If a strand of DNA has the sequence CCGTCT, transcription will result in a(n)

Answer.25) a.   single RNA strand with the sequence GGCAGA

Explanation: In the process of transcription a mRNA(messenger RNA) molecule is synthesized using DNA strand as the template, the bases on the mRNA will be complementary to the bases on the DNA strand, as explained in the above question no.24 the Cytosine(C) will pair with guanine (G) and vice versa. Thymine (T) will pair with Adenine (A).

The given DNA template is not having Adenine (A) otherwise it would have paired up with Uracil (U) in RNA molecule.(refer the note in Q.no. 24)

Q.26 ) If one strand of a DNA double helix has the sequence ATCGCA, what is the sequence of the other strand

Answer.26)   b.   TAGCGT

Explanation : The pairing of nitrogen bases in the DNA strand is complementary i.e. Adenine(A) always pairs with thymine(T) and vice versa. Guanine(G) always pairs with cytosine(C) and vice versa.

Q.27) Organisms carrying genes from another species are called

Answer.27) d.   transgenic

Explanation: Transgenic organisms are genetically engineered so that they carry gene from other species for example insulin producing gene in introduced into a bacterium like E.coli the bacterium becomes a transgenic.

Q.28) In a DNA double helix, adenine pairs with thymine and guanine pairs with cytosine.

Answer.28) c.   thymine . . . cytosine

Q.29) RNA contains uracil, whereas DNA contains thymine.

Answer.29) d.   uracil . . . thymine

Explanation for Q.28, 29 as in Q.24

Q.30) Where is translation accomplished?

Answer.30) d.   ribosomes

Explanation: Translation is the process of synthesis of a polypeptide (protein) from the sequence of nucleotides on the mRNA molecule, the process takes place on ribosomes with the help of tRNA(transfer RNA) and rRNA(ribosomal RNA)

Q.31) DNA and RNA are polymers of

Answer.31) b.   nucleotides

Explanation: A single nucleotide consists of a pentose sugar( Deoxyribose in DNA and ribose in RNA) , a phosphate group and a nitrogen base.

gladiator answered 1 year ago
Next > < Previous

Related Solutions

ALL ARE MULTIPLE CHOICE In his breeding experiments, Mendel first crossed true-breeding _____ generation plants to...
ALL ARE MULTIPLE CHOICE In his breeding experiments, Mendel first crossed true-breeding _____ generation plants to produce the _____ generation, which were then allowed to self-pollinate to generate the _____ offspring. F ... P1 ... P2 P1 ... P2 ... P3 P ... F1 ... F2 P1 ... P2 ... F F1 ... F2 ... F3 Two organisms with genotype AaBbCcDdEE mate. These loci are all independent. What fraction of the offspring will have the same genotype as the parents?...
You cross a true-breeding dark orange flowered poppy with crinkly petals to a true-breeding white-flowered poppy...
You cross a true-breeding dark orange flowered poppy with crinkly petals to a true-breeding white-flowered poppy with smooth petals. The F1 poppies are light orange with smooth petals. In the F2 generation you get 201 orange crinkly poppies; 400 light orange smooth poppies; and 199 white smooth poppies. Explain this observation using all appropriate terminology. Also provide a breeding diagram that clearly links genotypes to phenotypes. This is all that is given.
A true-breeding plant with red flowers was crossed with a true-breeding plant with white flowers. The...
A true-breeding plant with red flowers was crossed with a true-breeding plant with white flowers. The F1 progeny all had a new flower color, pink. The F1 plants were inter-crossed, and produced 44 red, 135 pink, and 61 white flower plants. (4 pts.) What is the most likely mode of inheritance being exhibited in these phenotypes. State your hypothesis and provide your reasoning, which can also include why other modes of inheritance are unlikely (process of elimination). Do not assign...
A true breeding red eyed fly with long bristles was crossed to a true breeding white...
A true breeding red eyed fly with long bristles was crossed to a true breeding white eyed fly with stubble bristles. All F1 progeny are red eyed with stubble bristles. An F1 female is crossed to a tester male and the following numbers of progeny are observed: 56 red eyed, stubble bristles; 72 red eyed, long bristles; 61 white eyed stubble bristles; and 68 white eyed, long bristles. You are asked to perform a chi-squared test for this result. 1....
Individuals from two separate true-breeding strains of white deer mice are crossed yielding all grey offspring....
Individuals from two separate true-breeding strains of white deer mice are crossed yielding all grey offspring. White is recessive to gray color based on crossing mice from each strain with a grey mouse. Which of the following would best explain this result? a. lethal alleles b. multiple alleles c. epistasis d. complementation e. incomplete dominance
Wheat kernels can be red, brown, or white. When true breeding reds are crossed with true...
Wheat kernels can be red, brown, or white. When true breeding reds are crossed with true breeding whites, all the offspring are brown. When these F1s are crossed you get the following results: 1883 Red kernels 1232 Brown kernels 197 White kernels There are varieties of brown, however, that are also true breeding. State a genetic hypothesis for inheritance of kernel color and test the above data for your hypothesis.
Father Mendel has found a new variant of peas to work with.  The true-breeding purple pea variety...
Father Mendel has found a new variant of peas to work with.  The true-breeding purple pea variety (pu) is mated to a true-breeding wrinkled (w) individual.  All of the F1 have yellow smooth peas A) What phenotypes, and in what relative quantities, would Father Mendel expect to see among the F2 generation produced by crossing the F1 hybrids to individuals with purple wrinkled peas(i.e., this is a test cross, not a selfing of the F1)?  Draw the Punnett Square (or rectangle) illustrating why...
Mendel crossed peas in such a way that 25% (or 145) of the 580 offspring peas...
Mendel crossed peas in such a way that 25% (or 145) of the 580 offspring peas were expected to have yellow pod. Instead of getting 145 peas with yellow pods, he obtained 152. Assume that Mendel’s 25% rate is correct. Find the probability that among the 580 offspring peas, exactly 152 have yellow pods.
Two pink-flowered azaleas are crossed. The cross produces are 25 pink, 13 white, and 10 lavender-flowered...
Two pink-flowered azaleas are crossed. The cross produces are 25 pink, 13 white, and 10 lavender-flowered plants. The color trait could be monogenic with incomplete dominance (1:2:1) or digenic with epistasis (9:4:3). What statistical test could you perform to test this hypothesis? Does this test actually allow you to distinguish between these hypotheses? Explain and show your calculations. Note: A p-value of 0.05 equals 5.99 equals for two degrees of freedom.
A true breeding swan flower plant with smooth petals is crossed with a true breeding swan...
A true breeding swan flower plant with smooth petals is crossed with a true breeding swan flower plant with constricted petals. The offspring of this cross all have smooth petals. This indicates that 1) the offspring do not have a constricted allele in their genotype 2) smooth petals are dominant and constricted petals are recessive 3)constricted and smooth petals are not controlled by alleles 4) the F2 generation will have all smooth petals 5) constricted petals are dominant and smooth...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT