A change in genetic constitution, which arises suddenly and not to segregation and
recombination of genes in sexual reproduction is called as:
a. Hybridization
b. Bud variation
c. Mutation
d. Non of them

1 Answer

Answer :

Mutation

Related questions

Description : Reduction or elimination of dormancy in crop plant is due to : a. Domestication b. Hybridization c. Mutation h. Acclimatization

Last Answer : Acclimatization

Description : The parts of stem from which a leaf arises is called a. Node b. Internodes c. Apex d. Bud

Last Answer : Node

Description : Crossing over in diploid organism is responsible for (a) segregation of alleles (b) recombination of linked alleles (c) dominance of genes (d) linkage between genes.

Last Answer : b) recombination of linked alleles

Description : why does sexual reproduction result in more genetic variation in species?

Last Answer : It combines different sets of DNA, instead of replicating the same set.

Description : Why does sexual reproduction result in more genetic variation in a species?

Last Answer : It mixes the chromosomes of the two parents

Description : Product of sexual reproduction generally generates (a) new genetic combination leading to variation (b) large biomass (c) longer viability of seeds (d) prolonged dormancy.

Last Answer : a) new genetic combination leading to variation

Description : Which one of the following generates new genetic combinations leading to variation? (a) Vegetative reproduction (b) Parthenogenesis (c) Sexual reproduction (d) Nucellar polyembryony

Last Answer : (c) Sexual reproduction

Description : Reproduction of plants through seeds are also called: a. Asexual propagation b. Vegetative propagation c. Sexual propagation d. Tissue culture

Last Answer : Sexual propagation

Description : .Change in sequence of nucleotide in DNA is called (a) mutagen (b) mutation (c) recombination (d) translation.

Last Answer : b) mutation

Description : Change in sequence of nucleotide in DNA is called (a) mutagen (b) mutation (c) recombination (d) translation.

Last Answer : mutation

Description : What is the significance of mutation and repair of mutations to evolution of sexual reproduction?

Last Answer : meow

Description : What is the significance of mutation and repair of mutations to evolution of sexual reproduction?

Last Answer : meow

Description : What is the difference between a mutation and a genetic variation?

Last Answer : A: A mutation is a change in the DNA sequence, while genetic variation refers to differences in the DNA sequence between individuals in a population.

Description : Which of the following(s) is/are found in Genetic Algorithms? (i) evolution (ii) selection (iii) reproduction (iv) mutation (a) i & ii only (b) i, ii & iii only (c) ii, iii & iv only

Last Answer : (a) i & ii only

Description : An inflorescence in which the pedicels of the flowers arises from the same points as called a. Umbel b. Spike c. Catkin d. Uninate

Last Answer : Umbel

Description : Which of the following cause new emerging infectious diseases? a. mutation b. recombination c. cross host ranges d. A-C are correct

Last Answer : d. A-C are correct

Description : Why does asexual reproduction result in more genetic diversity than sexual reproduction?

Last Answer : In asexual reproduction there are 2 daughter cells produced thatare identical to the parent cell. In sexual reproduction there are4 genetically different daughter cells produced that are ... of different haploid DNA to produce adiploid offspring which is genetically different from bothparents.

Description : How the genetic monotony overcome by the sexual reproduction?

Last Answer : Sexual reproduction is important to avoid genetic monotony the result of asexual reproduction where generation after generation exactly identical progeny develops sexual reproduction produces an endless variety ... each organism develops from a unique set of characters coming from different parents.

Description : What is the Genetic material for SEXUAL REPRODUCTION?

Last Answer : What is the Genetic material for SEXUAL REPRODUCTION

Description : Why does sexual reproduction result in more genetic variations in a species?

Last Answer : Because the offspring have genetic material from bothparents

Description : What is the Genetic material for SEXUAL REPRODUCTION?

Last Answer : What is the Genetic material for SEXUAL REPRODUCTION

Description : Why does sexual reproduction result in more genetic variations in a species?

Last Answer : Because the offspring have genetic material from bothparents

Description : Which statement best explains the evolutionary advantage of meiosis? (a) Meiosis is necessary for sexual reproduction. (b) Genetic recombinations are possible from generation to generation. (c) Meiosis ... to generation. (d) The same genetic system is passed on from generation to generation.

Last Answer : (b) Genetic recombinations are possible from generation to generation.

Description : Small, hair like outgrowth at the base of leaf stalk is termed as: a. Bud b. Bract c. Stipule d. Ligule

Last Answer : Stipule

Description : At fruit bud differentiation in mango, C/N ratio is _______: a. Low b. Medium c. High d. Very High

Last Answer : High

Description : Rate of bud development is ___________ upto winter season : a. Slow b. Rapid c. Medium d. Constant

Last Answer : Rapid

Description : The development of flower bud in tuberose is : a. Basipetal b. Exipetal c. Endopetal d. Acropetal

Last Answer : Acropetal

Description : The phase of fruit bud formation continues until _________: a. Anthesis b. Petal formation c. Pollination d. Differentiation

Last Answer : Anthesis

Description : Apical bud becomes ________ in mango at fruit bud differentiation : a. Flattened b. Rounded c. Dome shaped d. Elongated

Last Answer : Dome shaped

Description : Pruning in old fruit trees increases fruit bud formation by increasing ______: a. Carbohydrates b. New vegetative growth c. Hormonal contents d. Cell sap

Last Answer : New vegetative growth

Description : Addition of __________ hastens the time of fruit bud differentiation in fruit plants: a. Nitrites b. Nitrides c. Nitrates d. All of these

Last Answer : Nitrates

Description : Peduncle is a main axis of the a. leaf b. Flower c. Inflorescence d. Bud

Last Answer : Inflorescence

Description : The bud which develop into the axils of a leaf is a. Axillary buds b. Terminal buds c. Adventitious buds d. Naked buds

Last Answer : Axillary buds

Description : At fruit bud differentiation, nitrogen contents are _____________: a. Low b. Medium` c. High d. Very high

Last Answer : Low

Description : Edible portion of cabbage is a. Terminal bud b. Leaves c. Leaves + inflorescence d. All of above

Last Answer : Leaves

Description : Edible part of cauliflower is : a. Flowers b. Flower bud c. Vegetative bud d. Inflorescence

Last Answer : Vegetative bud

Description : Completion of pollination and fertilization in unopened flower bud is termed as a. Chasmogamy b. Apogamy c. Cleistogamy d. Dichogamy

Last Answer : Cleistogamy

Description : Mechanism preventing interbreeding is called – (1) Adaptation (2) Isolation (3) Reproduction (4) Recombination

Last Answer : (2) Isolation Explanation: Because interbreeding can destroy the genetic integrity of a species, causing it to become progressively infertile or extinct, evolutionary changes in anatomy ... reproduction from occurring. Reproductive Isolation is very important in keeping animal species separated.

Description : Mechanism preventing interbreeding is called : (1) Adaptation (2) Isolation (3) Reproduction (4) Recombination

Last Answer : Isolation

Description : Two linked genes a and b show 20% recombination. the individuals of a dihybrid cross between ++/++ × ab/ab shall show gametes (a) ++ : 80 : : ab : 20 (b) ++ : 50 : : ab : 50 (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10 (d) ++ : 30 : : ab : 30 : : + a : 20 : : + b : 20.

Last Answer : (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10

Description : Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to (a) repulsion (b) recombination (c) linkage (d) crossing over.

Last Answer : (c) linkage

Description : Which of the following statements is not true of two genes that show 50% recombination frequency? (a) The gene show independent assortment. (b) If the genes are present on the same chromo- some, they ... every meiosis. (c) The genes may be on different chromosomes. (d) The genes are tightly linked.

Last Answer : (b) If the genes are present on the same chromo- some, they undergo more than one cross-overs in every meiosis.

Description : The frequency of recombination between gene present on the same chromosome as a measure of the distance between genes was explained by (a) Sutton Boveri (b) T.H. Morgan (c) Gregor J.Mendel (d) Alfred Sturtevant.

Last Answer : (d) Alfred Sturtevant.

Description : Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Last Answer : (3) number of chromosomes Explanation: An organism having more than two sets of homologous chromosomes is known as polyploid and the phenomenon polyploidy. Polyploidy refers to a numerical change in ... due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.

Description : Polyploidy arises due to change in the (1) number of chromatids (2) structure of genes (3) number of chromosomes (4) structure of chromosomes

Last Answer : number of chromosomes

Description : The new varieties of plants are produced by (a) introduction and mutation (b) selection and introduction (c) selection and hybridization (d) mutation and selection.

Last Answer : (c) selection and hybridization

Description : A sexual cell in plants is called a. Gamete b. Gametophyte c. Gamopetalous d. Gamosepalous

Last Answer : Gamete

Description : Stooling is also called as a. Sexual propagatiobn b. Cutting c. Gooti layering d. Mound layering

Last Answer : Mound layering

Description : Apomictic seedlings are also called as: a. Nucellar seedlings b. Sexual seedlings c. Embryonic seedlings d. None

Last Answer : Nucellar seedling

Description : Crossing over that results in genetic recombination in higher organisms occurs between

Last Answer : Crossing over that results in genetic recombination in higher organisms occurs between A. Non- ... bivalents D. Sister chromatids of a bivalents