Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 56619
TLS Online TPP Program

#Question id: 9182

Imagine that a deep temperate zone lake did not turn over during the spring and fall seasons. Based on the physical and biological properties of limnetic ecosystems, what would be the difference from normal seasonal turnover?

#Unit 9. Diversity of Life Forms
  1. The lake would fail to freeze over in winter.
  2. An algal bloom of algae would result every spring.
  3.  Lakes would suffer a nutrient depletion in surface layers.
  4. The pH of the lake would become increasingly alkaline.
More Questions
TLS Online TPP Program

#Question id: 5354

#Unit 8. Inheritance Biology

Eye color gene link with X chromosome, If red eye color gene is dominant over white eye color gene. Which of the following genetic cross and their respective offspring is not correlated?

Genetic cross

Phenotype of offspring

1

Heterozygous Red eye female  X   Red eye Male

All male red eye

2

Heterozygous Red eye female  X   white  eye Male 

 Male either red  or white eye

3

Homozygous Red eye female  X   white eye Male 

All female red eye

4

Homozygous Red eye female  X   Red  eye Male

All male red eye

TLS Online TPP Program

#Question id: 5353

#Unit 8. Inheritance Biology

Which of following is not a mode of inheritance, but female parents (I-1) carry only normal allele?

A. X link recessive              b. Autosomal recessive

c. Autosomal dominant      d. X- link dominant
TLS Online TPP Program

#Question id: 5352

#Unit 8. Inheritance Biology

Marriage occurs between individuals III-3 and III-6, what is the probability couple; son would be affected with the trait?
TLS Online TPP Program

#Question id: 5351

#Unit 8. Inheritance Biology

Consider the accompanying pedigree of a rare autosomal recessive disease, PKU. (Assume individual coming from outside that is homozygous for normal allele) What is the probability of child showing trait of A and B individuals?
TLS Online TPP Program

#Question id: 5350

#Unit 8. Inheritance Biology

Which of the following most probable mode of genetic disorder?
TLS Online TPP Program

#Question id: 5349

#Unit 8. Inheritance Biology

The following is the inheritance pattern of a trait under observation:

(i) The trait often follow cris cross inheritance 

(iii) Unaffected father born to affected daughter

The trait is likely to be