Causes of phenotypic variation. -Biology

Description : The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challen

Last Answer : The process by which organisms with different evolutionary history evolve similar phenotypic ... Convergent evolution D. Non-random evolution

What are the genotypic and phenotypic ratios of the F2?

Description : What are the genotypic and phenotypic ratios of the F2?

Last Answer : Need answer

How does incomplete dominance differ from complete dominance in it's phenotypic expression?

Description : How does incomplete dominance differ from complete dominance in it's phenotypic expression?

Last Answer : In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.

If a dwarf pea plant was treated with gibberellic acid, it became as tall, as tall pea plants. If these pea plants are crossed with pure tall pea plants, what will be the phenotypic ratio in F1 generation? (a) All dwarf plants (b) 50% tall and 50% dwarf plants (c) 75% tall and 25% dwarf plants (d) 100% tall plants

Description : If a dwarf pea plant was treated with gibberellic acid, it became as tall, as tall pea plants. If these pea plants are crossed with pure tall pea plants, what will be the phenotypic ratio in F1 generation? ... (b) 50% tall and 50% dwarf plants (c) 75% tall and 25% dwarf plants (d) 100% tall plants

Last Answer : Ans. ((d))

Phenotypic ratio of Dicross hybrid

Description : Phenotypic ratio of Dicross hybrid

Last Answer : Ans. 9:3:3:1

Phenotypic ratio of Monocross hybrid

Description : Phenotypic ratio of Monocross hybrid

Last Answer : Ans. 3:1

Which of the following statements regarding endothelial cells in acute inflammation are true? a. Endothelial cells are characterized by phenotypic homogeneity b. Specific patterns of receptor expression regulate leukocyte adherence c. Endothelial cell nitric oxide generation regulates regional blood flow and leukocyte adhesion d. Endothelial cells may be capable of phagocytosis

Description : Which of the following statements regarding endothelial cells in acute inflammation are true? a. Endothelial cells are characterized by phenotypic homogeneity b. Specific patterns of receptor expression ... blood flow and leukocyte adhesion d. Endothelial cells may be capable of phagocytosis

Last Answer : Answer: b, c, d Endothelial cells are increasingly recognized to be phenotypically heterogeneous. Specific receptor molecules are expressed at various sites where they help to direct lymphocytes and ... rather, they possess the ability to direct and focus many aspects of an inflammatory event

Write the phenotypic ratio of monohybrid cross.

Description : Write the phenotypic ratio of monohybrid cross.

Last Answer : 3:1 (3 tall & 1 dwarf)

The animals of cold countries have relatively shorter and poorly developed ears, eyes, hairs and other phenotypic characters. This is known by which law? (a) Cope’s Law (b) Dollo’s Law (c) Allen’s Law (d) Bergamann’s Law

Description : The animals of cold countries have relatively shorter and poorly developed ears, eyes, hairs and other phenotypic characters. This is known by which law? (a) Cope’s Law (b) Dollo’s Law (c) Allen’s Law (d) Bergamann’s Law

Last Answer : (c) Allen’s Law

The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge, is called(a) non-random evolution (b) adaptive radiation (c) natural selection (d) convergent evolution.

Description : The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge, is called (a) non-random evolution (b) adaptive radiation (c) natural selection (d) convergent evolution.

Last Answer : (d) convergent evolution

In a genetic cross having recessive epistasis, F2 phenotypic ratio would be (a) 9 : 6 : 1 (b) 15 : 1 (c) 9 : 3 : 4 (d) 12 : 3 : 1.

Description : In a genetic cross having recessive epistasis, F2 phenotypic ratio would be (a) 9 : 6 : 1 (b) 15 : 1 (c) 9 : 3 : 4 (d) 12 : 3 : 1.

Last Answer : (c) 9 : 3 : 4

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of (a) co-dominance (b) dihybrid cross (c) monohybrid cross with complete dominance (d) monohybrid cross with incomplete dominance.

Description : F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of (a) co-dominance (b) dihybrid cross (c) monohybrid cross with complete dominance (d) monohybrid cross with incomplete dominance.

Last Answer : (d) monohybrid cross with incomplete dominance.

According to Hugo de Vries, the mechanism of evolution is :- (1) Multiple step mutations (2) Saltation (3) Phenotypic variations (4) Minor mutations

Description : According to Hugo de Vries, the mechanism of evolution is :- (1) Multiple step mutations (2) Saltation (3) Phenotypic variations (4) Minor mutations

Last Answer : (2) Saltation

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of (1) Monohybrid cross with incomplete dominance (2) Co-dominance (3) Dihybrid cross (4) Monohybrid cross with complete dominance

Description : F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of (1) Monohybrid cross with incomplete dominance (2) Co-dominance (3) Dihybrid cross (4) Monohybrid cross with complete dominance

Last Answer : (1) Monohybrid cross with incomplete dominance

What are the regions associated with a particular phenotypic trait having polygenic effect called as? a. Junk DNA b. Alleles c. Quantitative trait loci d. Discrete variables

Description : What are the regions associated with a particular phenotypic trait having polygenic effect called as? a. Junk DNA b. Alleles c. Quantitative trait loci d. Discrete variables

Last Answer : c. Quantitative trait loci

In the secondary culture, cells are obtained from a. primary culture b. the organism c. organ culture d. phenotypic culture

Description : In the secondary culture, cells are obtained from a. primary culture b. the organism c. organ culture d. phenotypic culture

Last Answer : a. primary culture

What phenotypic and genotypic ratios are expected in F2 generation when monohybrid and dihybrid crosses are made?

Description : What phenotypic and genotypic ratios are expected in F2 generation when monohybrid and dihybrid crosses are made?

Last Answer : Ans: Monohybrid cross : Phenotypic ratio is 3:1 and Genotypic ratio 1:2:1. Dihybrid cross : Phenotypic ratio 9:3:3:1. Genotypic ratio is 1:2:2:4:1:2:1:2:1

In sickle cell disease variation of one gene causes?

Description : In sickle cell disease variation of one gene causes?

Last Answer : Feel Free to Answer

In a sickle cell decease variation in one gene causes red blood cells to bend or sickle. this means the sickle cell?

Description : In a sickle cell decease variation in one gene causes red blood cells to bend or sickle. this means the sickle cell?

Last Answer : Feel Free to Answer

Which of the statements given below is not true about formation of annual rings in trees? (a) Annual rings are not prominent in trees of temperate region. (b) Annual ring is a combination of spring wood and autumn wood produced in a year. (c) Differential activity of cambium causes light and dark bands of tissue-early and late wood respectively. (d) Activity of cambium depends upon variation in climate.

Description : Which of the statements given below is not true about formation of annual rings in trees? (a) Annual rings are not prominent in trees of temperate region. (b) Annual ring is a combination ... of tissue-early and late wood respectively. (d) Activity of cambium depends upon variation in climate.

Last Answer : a) Annual rings are not prominent in trees of temperate region

Grading of sand causes great variation in (A) Workability of concrete (B) Strength of concrete (C) Durability of concrete (D) All the above

Description : Grading of sand causes great variation in (A) Workability of concrete (B) Strength of concrete (C) Durability of concrete (D) All the above

Last Answer : (D) All the above

Why is variation beneficial to the species but not necessarily for the individual? -Biology

Description : Why is variation beneficial to the species but not necessarily for the individual? -Biology

Last Answer : The various populations of organisms interact with many types of ecological niches. This is important for them to survive in given conditions. In case of any damage caused to the ecological ... to the varied conditions. Hence variation is beneficial to species, but not to the individuals.

Define variation in relation to a species. Why is variation beneficial to the species? -Biology

Description : Define variation in relation to a species. Why is variation beneficial to the species? -Biology

Last Answer : Variation refers to the differences in the characters or traits among the individuals of a species. Variations are beneficial to the species because:They enable the organisms to adapt themselves in ... the basis of heredity.They form the raw materials for evolution and development of new species.

Which branch of biology deals with study of heredity and variation?

Description : Which branch of biology deals with study of heredity and variation?

Last Answer : Genetics

Causes of phenotypic variation. -Biology

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

Answer :

Please log in or register to add a comment.

Related questions