Practice Questions

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#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

Student A had an allergic reaction to the food, causing him to perceive the food as being bitter.
Student A has normal "bitter" taste buds; student B has defective "bitter" taste buds that result in lower sensitivity to bitterness.
Student A has a protein receptor capable of detecting a bitter molecule found in that substance, whereas student B lacks that particular protein receptor.
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: 12175

#Unit 8. Inheritance Biology

Colour blind are X-linked disorder, a colour blind male have daughter cross with colour blind male, then what will be the probability of colour blindness?

TLS Online TPP Program

#Question id: 12174

#Unit 8. Inheritance Biology

Red-eyed female (X ^+X^+ ) crossed with white-eyed male (X^w Y) , all the F1 progeny shows the red phenotype, then what will be the probability of F2 phenotype;

i) Male with red eye phenotype

ii) Female with white eye phenotype

iii) Female with red eye phenotype

iv) Male with white eye phenotype

TLS Online TPP Program

#Question id: 12172

#Unit 8. Inheritance Biology

In haplodiploid condition, hymnoptera insects female mates with a single male , find the mean genetic relatedness of;

i) the females in the progeny are related to,

ii) the males in the progeny are related to,

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#Question id: 12171

#Unit 8. Inheritance Biology

In the case of recessive lethal, showing lethality with X^w. If the female grasshopper with the genotype (X^+ X^w) is cross with the male grasshopper with the genotype (X^+O) , then what will be the probability of showing lethality in male and female?

TLS Online TPP Program

#Question id: 12170

#Unit 8. Inheritance Biology

Sex determination in the grasshoppers is X-linked, if the cross is made between the heterozygous red phenotypic female with the heterogametic red phenotypic male , then what will be the ratio of male and female with the red phenotype in F1 generation?

TLS Online TPP Program

#Question id: 11627

#Unit 8. Inheritance Biology

The interaction of two loci that determine fruit color in summer squash, which is commonly found in one of three colors: yellow, white, or green. When a homozygous plant that produces white squash is crossed with a homozygous plant that produces green squash and the F1 plants are crossed with each other, the following results are obtained:

12/16 plants with white squash

3 /16 plants with yellow squash

1 /16 plants with green squash

This is the case of___