TLS Online TPP Program

#Question id: 11484


Two students studying physiology taste a known "bitter" substance, and both report sensing bitterness. They then sample another substance. Student A reports sensing both a bitter taste and a salty taste, but student B reports only a salty taste. What is the most logical explanation?

#Unit 7. System Physiology – Animal
  1. Student A had an allergic reaction to the food, causing him to perceive the food as being bitter.
  2. Student A has normal "bitter" taste buds; student B has defective "bitter" taste buds that result in lower sensitivity to bitterness.
  3. Student A has a protein receptor capable of detecting a bitter molecule found in that substance, whereas student B lacks that particular protein receptor.

  4. Student A has normal saliva, whereas student B's saliva is more alkaline than normal.
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TLS Online TPP Program

#Question id: 11620

#Unit 8. Inheritance Biology

The expression of some genes is significantly affected by their parental origin, , the differential expression of genetic material depending on whether it is inherited from the male or female parent, is called

TLS Online TPP Program

#Question id: 11619

#Unit 8. Inheritance Biology

If a cross between restricted and dusky  ducks  the only progeny will be form from this cross is restricted and mallard, so what will be the genotype of parents?

TLS Online TPP Program

#Question id: 11618

#Unit 8. Inheritance Biology

A monohybrid cross between two heterozygous  yellow mice forms the progeny in F1 generation  is  yellow and  non-yellow with the genotype YY(Lethal) and yy , so what will be the ratio of this cross?

TLS Online TPP Program

#Question id: 11617

#Unit 8. Inheritance Biology

Individuals with a particular genotype that express the phenotype expected of that genotype, this is known as

TLS Online TPP Program

#Question id: 4798

#Unit 8. Inheritance Biology

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. We’ll use the symbol Bb for the beard allele and B for the beardless allele. Another independently assorting autosomal allele that produces a black coat (W) is dominant over the allele for white coat (w). A cross allowed between BBbWw (male) X BBbWw (female). What is proportional of female progeny will beard with black coat?

TLS Online TPP Program

#Question id: 3609

#Unit 8. Inheritance Biology

In humans, the dominance relationship between the A and B alleles of the ABO blood group gene is an example of