Heredity and Evolution - 1 (Class X)
Heredity and Evolution - 1
Questions
Few individuals are AB blood types of the ABO blood system. They posses all the features of both type A and type B blood but they are not a blend of them. This is due to the
- codominance
- dominance
- blending
- pleiotropy
Somatic cells in human beings contain
- 46 pairs of chromosomes
- 23 pairs of chromosomes
- 26 chromosomes
- 23 chromosomes
- No chromosomes
What do we call the actual genetic make up of an organism which may or may not be visible by the apparent characters?
- Phenotype
- Acquired traits
- Inheritable traits
- Genotype
- Haploid
In a certain plant, purple flowers are dominant to red flowers. If the cross of two purple-flowered plants produces some some purple-flowered and some red-flowered plants, what is the genotype of the parent plants?
- PP x Pp
- Pp x Pp
- pp x pp
- pp x PP
- PP x PP
Which of the following is not a vestigial organ in humans?
- Nictitating membrane
- Toe nail
- Wisdom tooth
- Coccyx
- Appendix
Who proposed recapitulation theory?
- E. Haeckel
- Charles Robert Darwin
- Alfred Wallace
- Thomas Malthus
Who proposed the theory that life originated in the ocean in the form of naked genes?
- Empedocles
- Raymod Dart
- Horowitz
- Prof. Birbal Sahni
- None of these
The evolution of giraffe with long neck was explained by Lamarck. Which of the following reasons was given by him?
- The frequent turning back of neck for itching gradually elongated the neck in successive generations.
- Eating of the foliage high up on the trees as there was no vegetation on the ground in the desert areas, gradually elongated the neck in successive generations.
- Giraffe rested with its neck pulled behind, which gradually elongated the neck in successive generations.
- Giraffe had 90% of its diet including bamboo, which gradually elongated its neck in successive generations.
- None of these
Which of the following animals represents a connecting link between amphibians and reptiles?
- Chimaera
- Balanoglossus
- Seymouria
- Neopilina
- Archeopteryx
The wings of a bat and a bird are examples of
- analogous organs
- speciation
- homologous organs
- fossils
Genes for different traits are passed on to the offspring independently. This statement is known as
- law of dominance
- inheritance
- natural selection
- independent assortment
- genetics
Identify the correct chronological sequence of appearance from the given options.
- Homo erectus, homo habilis, homo sapiens
- Homo sapiens, homo habilis, homo erectus
- Homo erectus, homo sapiens, homo habilis
- Homo habilis, homo erectus, homo sapiens
- Homo sapiens, homo erectus, homo habilis
The theory of pangenesis was proposed by
- Weismann
- Charles Darwin
- Sewall Wright
- Darlington
- Malthus
Which of the following forms the basic concepts in the theory of evolution by natural selection?
- Inheritance of acquired character
- Change in germplasm brings about evolution
- Modifications in organs through use and disuse
- Prodigality of reproduction, struggle for existence and survival of the fittest
- Appearance of sudden large variations, their inheritance and survival of those having these variations
The process of origination of life on Earth was experimentally shown by
- Urey and Miller
- Oparin and Haldane
- Watson and Crick
- None of these