TLS Online TPP Program

#Question id: 2003


The number of MHC protein combinations possible in a given population is enormous. However, an individual in that population has only a couple of MHC possibilities. Why?

#Unit 4. Cell Communication and Cell Signaling
  1. The MHC proteins are made from several different gene regions that are capable of rearranging in a number of ways.

  2. MHC proteins from one individual can only be of class I or class II.

  3. Each of the MHC genes has a large number of alleles, but each individual only inherits 2 for each gene.

  4. Once a B cell has matured in the bone marrow, it is limited to two MHC response categories.

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TLS Online TPP Program

#Question id: 3596

#Unit 8. Inheritance 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: 3597

#Unit 8. Inheritance Biology

In a family of four children, what is the probability of obtaining the following numbers of boys and girls?

(a) All boys(b) All children of the same sex(c) two girls and two boy(d) three boys and one girls

TLS Online TPP Program

#Question id: 3598

#Unit 8. Inheritance Biology

Mendel crossed, round tall pea plants RRTT with wrinkle dwarf rrtt. The F1 plants were all round tall. These F1 plants were selfing, following genotype are selected from F2 generation

A- RrTT       B- RrTt        C- RRtt 

Which of the following decreasing frequency of this genotype?

TLS Online TPP Program

#Question id: 3599

#Unit 8. Inheritance Biology

In cats, blood type A results from an allele (A) that is dominant over an allele (B) that produces blood type B. There is no O blood type, following two cross are

a. blood type A X blood type B = 4 kittens with blood type A, 4 with blood type B

b. blood type A X blood type A = 6 kittens with blood type A, 3 kittens with blood type B. What are genotype of parent

TLS Online TPP Program

#Question id: 3600

#Unit 8. Inheritance Biology

Following is monohybrid cross for two character are given

Following some observation are Correct?

A) Incomplete dominance in flower color

B) Complete dominance in seed color

C) Flower color does not follow law of segregation

D) No blending inheritance in seed color

TLS Online TPP Program

#Question id: 3601

#Unit 8. Inheritance Biology

In cucumbers, dull fruit (D) is dominant over glossy fruit (d), orange fruit (R) is dominant over cream fruit (r), and bitter cotyledons (B) are dominant over non-bitter cotyledons (b). The three characters are encoded by genes located on different pairs of chromosomes. A plant homozygous for dull, orange fruit and bitter cotyledons is crossed with a plant that has glossy, cream fruit and nonbitter cotyledons. The F1 are intercrossed to produce the F2. What will be expected proportions progeny with Dull, Orange and non-bitter?