b. The genes that produce the enzymes needed to break down lactose are not expressed.
c. E. coli is not able to survive without lactose.
d. The genes required to produce the enzymes that break down lactose are destroyed.
D. The genes that produce the enzymes needed to break down lactose are not expressed.
Absolutely sure!
Answer: A genotype Tt (f) will make their child not to have freckles. Only offspring with alleles containing the dominant gene 'F' will have freckles.
Explanation:
MENDEL'S PRINCIPLES OF INHERITANCE can be used to understand how genes and their alleles are passed down from one generation to the next.
The 3 principles include:
1. Law Of Dominance And Uniformity: Some alleles are dominant while others are recessive; an organism with at least one dominant allele will display the effect of the dominant allele.
2. Law of segregation: During gamete formation, the alleles for each gene segregate from each other so that each gamete carries only one allele for each gene.
3. Law of independent assortment: Genes of different traits can segregate independently during the formation of gametes.
Answer: All of the mentioned Scientist made considerable contributions to understanding the DNA molecule in the order:
Explanation: 1.Fredrick Griffith
2. Avery, McCarty and MacLeod
3.Chargaff
4.Hershey and Chase
5.Watson and Crick
Answer:
Griffith, Chargaff, Avery Mc Carty and MacLeod, Hershey and Chase, Watson and Crick,
Explanation:
Avery, McCarty and MacLeod- their famous experiment, an experimental demonstration of DNA was presented in 1944
Griffith: born in 1877. In 1928 he reported his first observation of transforming principle in bacteria.
Hershey and Chase: They conducted series of experiments in 1952 to confirm that DNA is a genetic material
Watson and Crick: Crick was born in 1916 and Watson in 1928. Their discovery of DNA as double helix structure was made in 1953
Chargaff was born in 1905. He developed two rules that led to the discocery of DNA as double helix structure
Answer:
a)0%
Explanation:
B. Plain folks
C. Bandwagon
D. Card stacking
Answer: D. Card stacking
Card stacking is a propaganda technique which is used by the politicians in order to manipulate the perception of the audience by emphasizing and highlighting their good deeds and repressing their negative ends and negligence. The technique is commonly used in their persuasive or vote appealing speeches to make themselves more worthy for the desired position over the opponent party.