Question

In: Biology

12. If a heterozygous dominant tall pea is crossed with a short plant, what is the...

12. If a heterozygous dominant tall pea is crossed with a short plant, what is the expected phenotype ratio?

13. Give three examples of phenotypes.

14. Why is skin color classified as polygenic inheritance?

15. If the parental genotype is EeWw, what are the potential allele combinations that could occur at the end of meiosis?

16. During DNA replication, a DNA strand with the bases CTAGGT will produce what complimentary strand of bases?

17. In their experiment, what would Hershey and Chase have concluded if radioactive sulfur was found in the bacteria?

18. If an organism's DNA contains 20% adenine nucleotides, what percentage of its DNA is composed of guanine nucleotides?

Solutions

Expert Solution

12. Heterozygous dominant tall plant w should have genotype Tt and short plant is tt. The resultant progeny on crossing will be Tt×tt are Tt and tt i.e one heterozygous tall and one short. Hence the phenotypic ratio will be 1:1

13. Examples of phenotypes are height( tall , short) , flower colour, flower position,seed shape , eye colour etc.

14. Skin colour is considered as polygenic trait because it is determined by atleast three genes and also other genes are said to influence it.

15. If the parental genotype is EeWw, the potential allele combination at the end of meiosis would be EW,Ew,eW and ew.

16. The complementary DNA strand produced by CTAGGT will have the bases GATCCA.

17. As the protein contains sulfur , if the radioactive sulfur was found in the bacteria , they would have concluded that protein is carried from generation to generation and not DNA. Means protein is a genetic material and not DNA.

18. If DNA contains 20% adenine nucleotides means the equal amount of its complementary nucleotides i.e thymine will also be present . Hence the total adenine and thymine nucleotides would be 40% . Now as DNA also contains cytocine and guanine means remaining 60% would be of these. As these both are also complementary hence among these 60% , 30% will be cytocine and 30% will be guanine nucleotide.

gladiator answered 1 year ago
Next > < Previous

Related Solutions

Assume that a cross is made between a heterozygous tall pea plant and a homozygous short...
Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. Fifty offspring are produced in the following frequency: 30 = tall 20 = short (a) What frequency of tall and short plants is expected? (b) To test the goodness of fit between the observed and expected values, provide the needed statement of the null hypothesis. (c) Compute a Chi-square value associated with the appropriate test of significance. (d) How many degrees of...
In pea plants, tall (T) is dominant over short (t). What are the genotypes and phenotypes...
In pea plants, tall (T) is dominant over short (t). What are the genotypes and phenotypes of the offspring of a cross between a TT and a tt plant? Genotype____________               Phenotype___________
A pure breeding tall plant with smooth seeds was crossed with a pure breeding short plant...
A pure breeding tall plant with smooth seeds was crossed with a pure breeding short plant with wrinkled seeds. All the F1 plants were tall with smooth seeds. Two of these F1 plants were crossed and four different phenotypes were obtained in the 320 plants produced. How many tall plants with wrinkled seeds should you expect to find.  
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous for purple flowers. Both are heterozygous for being tall plants. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple __________ short purple __________ tall white __________ short...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous for purple flowers. Both are heterozygous for being tall plants. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple short purple tall white short white In a...
In garden pea plants, tall stem length (T) is dominant over short stem length (t). In...
In garden pea plants, tall stem length (T) is dominant over short stem length (t). In an ideal garden pea plant population exhibiting Hardy–Weinberg equilibrium, if allele T has a frequency of 0.88, what percentage of the population is recessive for this trait? Round your answer to the nearest whole number. -------- There is a lack of dominance in black (B) and white (W) horse coat colours. An offspring produced from a black horse and a white horse has a...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous for being short and the other is heterozygous for being tall. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple short purple tall white short white In...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous for being short and the other is heterozygous for being tall. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple short purple tall white short white In...
In tomatoes, a heterozygous plant with normal fruit and purple stems is crossed with a recessive...
In tomatoes, a heterozygous plant with normal fruit and purple stems is crossed with a recessive plant having fasciated fruit and green stems. The following distribution of offspring is observed: normal fruit, purple stems 38.5%  fasciated fruit, green stems 38.5% normal fruit, green stems 11.5%   fasciated fruit, purple stems 11.5% What conclusion can be made regarding the loci for fruit shape and stem color? HINT determine the RF What the loci and RF here mean? How to answer this question?
In violets, purple is dominant to white and tall stems are dominant to short stems. ....
In violets, purple is dominant to white and tall stems are dominant to short stems. . A tall purple plant that is heterozygous at both loci is crossed with a double homozygous recessive plant. What is the probability of obtaining either a tall white plant or a short purple plant? What percent of the offspring are expected to be heterozygous at one or both loci? What will be the expected ratio of the F2 offspring of the F1 generation?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT