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#Question id: 1998


Jenner successfully used cowpox virus as a vaccine against the virus that causes smallpox. Why was he successful even though he used viruses of different kinds?

#Section 2: General Biology
  1. The immune system responds nonspecifically to antigens.

  2. The cowpox virus made antibodies in response to the presence of smallpox.

  3. Cowpox and smallpox are antibodies with similar immunizing properties.

  4. There are some antigenic determinants common to both pox viruses.

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TLS Online TPP Program

#Question id: 3593

#Section 3: Genetics, Cellular and Molecular Biology

In the cross Aa Bb Cc Dd X Aa Bb Cc Dd, in which all genes undergo independent assortment, what proportion of offspring are expected to be at least one heterozygous for locus gene?

TLS Online TPP Program

#Question id: 3594

#Section 3: Genetics, Cellular and Molecular Biology

following different cross allowed and their respective phenotype.

Character

Male genotype

Female genotype

Progeny phenotype

M

Aa

Aa

3:1

N

Aa

aa

1:1

O

Aa

AA

1:1

P

Aa

AA

1

Which of the following observation conclude correct mode of dominance?

TLS Online TPP Program

#Question id: 3595

#Section 3: Genetics, Cellular and Molecular Biology

Ranch mink with the dark gray coat color known as Aleutian is homozygous recessive aa. Genotypes AA and Aa have the standard deep brown color. A mating of Aa  X Aa produces  four  pups. What is the probability of a perfect 3 : 1 distribution of standard to Aleutian?

TLS Online TPP Program

#Question id: 3596

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following correct regarding test cross?

a) A testcross tests reveals the genotype of the individual

b)  Test cross detect linkage between gene

c) Same genotype and phenotype ratio present in test cross progeny

d) Phenotype ratio of test cross used to determine mode of inheritance either complete dominance or incomplete dominance

TLS Online TPP Program

#Question id: 3604

#Section 3: Genetics, Cellular and Molecular Biology

Genes A, B and C. control three phenotypes which assort independently; A plant with the genotype aaBbCc were cross with AabbCc. What is the probability for progeny which show the dominant phenotype for AT LEAST ONE of the phenotypes controlled by genes A, B and C?

TLS Online TPP Program

#Question id: 3606

#Section 3: Genetics, Cellular and Molecular Biology

Genes A, B and C. control three phenotypes which assort independently; A plant with the genotype Aa Bb Cc is selfed. What is the probability for progeny which show the heterozygocity for AT LEAST ONE locus?