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.

1 Answer

Answer :

(c) 9 : 3 : 4

Related questions

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.

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

Description : f we cross pure-bred tall (dominant) pea plant with pure-bred dwarf (recessive) pea plant we will get pea plants of F1 generation. If we now self-cross the pea plant of F2 generation, ... plants not found in F2 generation but appeared in F2 generation, mentioning the reason for the same. -Biology

Last Answer : Answer. (a) All plants of F1 generation will be tall plants. (b) 3:1 (c) Dwarf trait is recessive trait which was not expressed in the F1 generation, the recessive trait gets expressed in the F2 generation after self pollination.

Description : 5 Consider a cross in which a trait is inherited by incomplete dominance. What percentage of the F2 from the matng of homozygous dominant and homozygous recessive individuals will possess the dominant phenotype? a) 0 per cent b) 25 per cent c) 50 per cent d) 75 per cent

Last Answer : ANS: b 25 per cent

Description : Select the correct Match : (1) Ribozyme - Nucleic acid (2) F2 x Recessive parent - Dihybrid cross (3) TH. Morgan - Transduction (4) G. Mendel - Transformation

Last Answer : (1) Ribozyme - Nucleic acid

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

Last Answer : Need answer

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 

Description : Recessive epistasis is shown by

Last Answer : Recessive epistasis is shown by A. Flower colour in Sweat Pea B. Fruit colour of Summer Squash C. Coat colour of Mice D. Shape of comb in pultry

Description : Fruit colour in squash is an example of (a) recessive epistasis (b) dominant epistasis (c) complementary genes (d) inhibitory genes.

Last Answer : (a) recessive epistasis

Description : In a cross between AABB × aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be (a) 9 : 3 : 3 : 1 (b) 2 : 1 : 1 : 2 (c) 1 : 2 : 2 : 1 (d) 7 : 5 : 3 : 1.

Last Answer : (c) 1 : 2 : 2 : 1

Description : In which cross would you obtain a 9:3:3:1 ratio for F2 Progeny. What is the test cross ratio of the same cross. 

Last Answer : Ans: Dihybrid cross. Test cross ratio is 1:1:1:1

Description : What is the phenotypic ratio of a monohybrid cross? -Biology

Last Answer : answer:

Description : What is the phenotypic ratio of a monohybrid cross? -Biology

Last Answer : answer:

Description : Write the phenotypic ratio of monohybrid cross.

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

Description : A true breeding plant is (a) one that is able to breed on its own (b) produced due to cross-pollination among unrelated plants (c) near homozygous and produces offspring of its own kind (d) always homozygous recessive in its genetic constitution.

Last Answer : c) near homozygous and produces offspring of its own kind

Description : Which one of the following cannot be explained on the basis of Mendel's law of dominance? (a) The discrete unit controlling a particular character is called a factor. (b) Out of one pair of ... any blending and both the characters recover as such in F2 generation. (d) Factors occur in pairs.

Last Answer : (c) Alleles do not show any blending and both the characters recover as such in F2 generation

Description : A blue colour flower plant denoted by BB is cross bred with that of white colour flower plant denoted by bb. (a) State the colour of flower you would expect in their F1 generation plants. (b) What ... -pollinated? (c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. -Biology

Last Answer : This is your Answer.

Description : What was the ratio of Mendel's F2 generation for the two-factor cross?

Last Answer : 9:3:3:1 was the ratio of Mendel's f2 generation for the twofactor cross.

Description : 9. To analyse the genotype of an organism, it is made to (a) Self cross (b) Cross with recessive parent (c) Cross with dominant parent (d) Cross with another species

Last Answer : (b) Cross with recessive parent

Description : On selfing a plant of F1-generation with genotype “AABbCC”, the genotypic ratio in F2-generation will be (a) 3 : 1 (b) 1 : 1 (c) 9 : 3 : 3 : 1 (d) 27 : 9 : 9 : 9 : 3 : 3 : 3 : 1.

Last Answer : (a) 3 : 1

Description : The cross of F1 hybrid with an individual having recessive phenotype for concerned trait is called a. Test cross b. Multiple cross c. Top cross d. Polly cross

Last Answer : a. Test cross

Description : Difference between phenotypic ratio and genotypic ratio. -Biology

Last Answer : answer:

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))

Description : Phenotypic ratio of Dicross hybrid

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

Description : Phenotypic ratio of Monocross hybrid

Last Answer : Ans. 3:1

Description : What is a recessive lethal genetic disorder?

Last Answer : Feel Free to Answer

Description : What does dominant and recessive mean in genetic?

Last Answer : What is the answer ?

Description : All are true about lesch-nyhan syndrome except (A) Produces self-mutilation (B) Genetic deficiency of the enzyme (C) Elevated levels of uric acid in blood (D) Inheritance is autosomal recessive

Last Answer : Answer : B

Description : Down Syndrome, a congenital genetic disorder in human beings, is cased by : (a) a defective recessive gene in homozygous condition (b) an extra x chromosome (c) trisomy of chromosome 18 (d) trisomy of chromosome 21

Last Answer : Ans:(d)

Description : A genetically diseased father (male) marries with a normal female and gives birth to 3 carrier girls and 5 normal sons. It may be which type of genetic disease? (a) Sex-influenced disease (b) Blood group inheritance disease (c) Sex-linked disease (d) Sex-recessive disease

Last Answer : (c) Sex-linked disease

Description : Which one is the incorrect statement with regard to the importance of pedigree analysis? (a) It confirms that DNA is the carrier of genetic information. (b) It helps to understand whether the trait in ... linked to one of the autosome. (d) It helps to trace the inheritance of a specific trait.

Last Answer : (a) It confirms that DNA is the carrier of genetic information.

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

Description : F2 generation of a monohybrid cross. -Biology

Last Answer : answer:

Description : F2 generation of a dihybrid cross. -Biology

Last Answer : answer:

Description : One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in (a) one-third of the progenies (b) none of the progenies (c) all the progenies (d) fifty percent of the progenies.

Last Answer : (b) none of the progenies

Description : In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the ... green cotyledons (c) Only wrinkled seeds with yellow cotyledons (d) Only wrinkled seeds with green cotyledons

Last Answer : (d) Only wrinkled seeds with green cotyledons

Description : A test cross is carried out to (a) determine the genotype of a plant at F2 (b) predict whether two traits are linked (c) assess the number of alleles of a gene (d) determine whether two species or varieties will breed successfully.

Last Answer : (a) determine the genotype of a plant at F2

Description : 4) In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are: (a) Phenotypes-4,genotypes-16 (b) ) Phenotypes-9,genotypes-4 (c) ) Phenotypes-4,genotypes-8 (d) ) Phenotypes-4,genotypes-9

Last Answer : 4.d Phenotypes-4,genotypes-9

Description : What is Epistasis ?

Last Answer : Epistasis is the process by which one gene inhibits the expression of another non-allelic gene.

Description : $ Gregor mendel is also known as the "father of biology" ! He gave the law of Epistasis.

Last Answer : $ Gregor mendel is also known as the "father of biology" ! He gave the law of Epistasis. A. If both As ... R is wrong D. If both As and R are wrong.

Description : When one gene pair hides the effect of the other unit, the phenomenon is referred to as: (1) Epistasis (2) Mutation (3) None of the options (4) Dominance

Last Answer : (1) Epistasis Explanation: Epistasis refers to the phenomenon in which one gene hides the effect of the other. In other word, it does not allow the other gene to express itself. This is counterpart of ... may be in one direction only meaning that ei-ther A hides the effect of B or vice versa.

Description : When a single gene influences more than one trait it is called (a) pseudodominance (b) pleiotropy (c) epistasis (d) none of these.

Last Answer : (b) pleiotropy

Description : The phenomenon, in which an allele of one gene suppresses the activity of an allele of another gene, is known as (a) epistasis (b) dominance (c) suppression (d) inactivation

Last Answer : (a) epistasis

Description : A gene pair hides the effect of another gene. The phenomenon is called (a) dominance (b) segregation (c) epistasis (d) mutation

Last Answer : (c) epistasis

Description : Two non-allelic genes produces the new phenotype when present together but fail to do so independently then it is called (a) epistasis (b) polygene (c) non complementary gene (d) complementary gene.

Last Answer : epistasis

Description : ABO blood group system is due to (a) multifactor inheritance (b) incomplete dominance (c) multiple allelism (d) epistasis.

Last Answer : (c) multiple allelism

Description : The type of gene interaction in which the effects of one gene override or mask the effects of other entirely different genes is called: a) linkage b) mutation c) pleitropy (pron: ply-ah-tropy) d) epistasis (pron: eh-pis-te-sis)

Last Answer : ANSWER: D -- EPISTASIS

Description : When one gene pair hides the effect of the other unit, the phenomenon is referred to as: (1) Epistasis (2) Mutation (3) None of the options (4) Dominance

Last Answer : Epistasis

Description : $ A cross between the pure recessive parent and the F-1 offspring is called Test cross. ! Test cross is a type of Back cross.

Last Answer : $ A cross between the pure recessive parent and the F-1 offspring is called Test cross. ! Test cross is a ... is wrong D. If both As and R are wrong.

Description : Cross between hybrid and recessive parent is: (a) Back cross (b) Test cross (c) Monohybrid cross (d) Dihybrid cross Ans. (b) ................................................----- ... - PMT, AIIMS, MBBS,lucknow 1. Largest egg of plant kingdom belongs to: (a) Cycas (b) Pinus (c) Psidium (d) Mangfera

Last Answer : Ans. ((a))