Description : If a homozygous dominant parent and a heterozygous parent are crossed what percentage of the offspring are expected to be homozygous recessive?
Last Answer : Rr
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 : Why is a homozygous recessive used in a testcross? -Biology
Last Answer : answer:
Description : When crossing a homozygous recessive with a heterozygote? -Biology
Description : A cross between homozygous recessive and heterozygous plant is - (1) Back cross (2) Test cross (3) Monohybrid cross (4) Dihybrid cross
Last Answer : (2) Test cross Explanation: A cross between homozygous recessive and heterozygous plant is called Test Cross
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 : 4. Crossing a Dominant character with (Homozygous & Hetrozygous) with a recessive trait to know the genome is called;- a) Back cross b) Monohybrid Cross C) Test Cross d)Dihybrid Cross
Last Answer : C) Test Cross
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 : A cross between homozygous recessive and heterozygous plant is (1) Back cross (2) Test cross (3) Monohybrid cross (4) Dihybrid cross
Last Answer : Test cross
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 : Test cross involves (a) crossing between two genotypes with dominant trait (b) crossing between two genotypes with recessive trait (c) crossing between two F1 hybrids (d) crossing the F1 hybrid with a double recessive genotype.
Last Answer : (d) crossing the F1 hybrid with a double recessive genotype.
Description : Test cross in plants or in Drosophila involves crossing (a) between two genotypes with recessive trait (b) between two F1 hybrids (c) the F1 hybrid with a double recessive genotype (d) between two genotypes with dominant trait.
Last Answer : (c) the F1 hybrid with a double recessive genotype
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 : A progeny of single homozygous, self pollinated crops
Last Answer : Ans. Pure line
Description : How you can determine whether or not the black parent is homozygous or heterozygous for the condition?
Last Answer : You are not giving enough information to solve this. But, in practice, further crosses will give some clue if the same results occur. If that happens, then the parent in homozygous dominant.
Description : Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising (a) genetically uniform population ... homozygous diploid plants (c) new species (d) variants through picking up somaclonal variations.
Last Answer : (a) genetically uniform population identical to the original parent
Description : Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character. (a) The female parent is heterozygous. (b) The parents could not ... The trait under study could not be colour blindness. (d) The male parent is homozygous dominant.
Last Answer : (a) The female parent is heterozygous.
Description : Superiority of F1 hybrids over both of its parents is termed as
Last Answer : Ans. Heterosis
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 : A common test to find the genotype of a hybrid is by (a) crossing of one F2 progeny with female parent (b) studying the sexual behaviour of F1 progenies (c) crossing of one F1 progeny with male parent (d) crossing of one F2 progeny with male parent
Last Answer : (c) crossing of one F1 progeny with male parent
Description : When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited a. an allele for tallness from each parent. b. an allele for tallness from the tall parent and an allele for shortness ... parent. c. an allele for shortness from each parent. d. an allele from only the tall parent.
Last Answer : b. an allele for tallness from the tall parent and an allele for shortness from the short parent.
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 : If one parent has two dominant alleles and another parent has two recessive alleles the offspring will have?
Last Answer : PFHHHHH
Description : If Parent 1 Ty crosses with Parent 2 Ty what percentage of offspring will display the recessive trait?
Last Answer : Need answer
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))
Description : A cross in which an organism showing a dominant phenotype is crossed with the recessive parent in order to know its genotype is called (a) monohybrid cross (b) back cross (c) test cross (d) dihybrid cross.
Last Answer : (c) test 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 : A hybrid produced using nucleous of one parent cell and cytoplasm of both the cell
Last Answer : Ans. Cybrid
Description : When heterosis estimated over the superior or better parent
Last Answer : Ans. Heterobeltiosis
Description : The parent which is used only once in back cross breeding method
Last Answer : Ans. Donor
Description : What is homozygous? -Biology
Description : Difference between homozygous and heterozygous. -Biology
Description : Why are homozygous alleles lethal? -Biology
Description : Why is homozygous achondroplasia lethal? -Biology
Description : Why is a purebred homozygous? -Biology
Description : Another word for homozygous. -Biology
Description : If a homozygous black guinea pig is crossed with a white guinea pig what is the probability that an offspring will have black fur?
Last Answer : depends if the black fur gene is dominant..if it is...then yu would cross BB with bb making all heterozygousgenotypes(Bb)therefore, having all possible offspring with black furso theres a 100% probability of offspring with black fur(:
Description : What is Homozygous ?
Last Answer : : Two genes with the same allele in a diploid organism are called homozygous locus.
Description : A double homozygous yello round plant of Pea is crossed with green wrinkled plant. The offspring shall be of
Last Answer : A double homozygous yello round plant of Pea is crossed with green wrinkled plant. The offspring shall ... Two types C. Four types D. Several types
Description : What genes does a homozygous short pea plant always have?
Description : Is DD heterozygous or homozygous?
Last Answer : homozygous
Description : For peas, round seed shape (R) is dominant to wrinkled seed shape (r). A homozygous dominant plant is crossed with a heterozygous plant. What are the expected ratios for genotype and phenotype of the offspring?
Last Answer : rr, Rr
Description : What is a homozygous?
Last Answer : It is a genetic similarity between two organisms.
Description : In crop movement programme, haploids are important because they (a) require one half of nutrients (b) are helpful in study of meiosis (c) grow better under adverse conditions (d) form perfect homozygous.
Last Answer : (d) form perfect homozygous.
Description : Homozygous purelines in cattle can be obtained by (a) mating of unrelated individuals of same breed (b) mating of individuals of different breed (c) mating of individuals of different species (d) mating of related individuals of same breed
Last Answer : (d) mating of related individuals of same breed.
Description : The quickest way to produce homozygous breeding lines from heterozygous parents is through: (a) Half-seed technique (b) doubled haploids (c) Introgression (d) Aneuploidy
Last Answer : (b) doubled haploids
Description : Selection of homozygous plant is (a) pure line selection (b) mass selection (c) mixed selection (d) introduction
Last Answer : (a) pure line selection
Description : Which one of the following conditions correctly describes the manner of determining the sex? (a) Homozygous sex chromosomes (ZZ) determine female sex in birds. (b) XO type of sex chromosomes ... s syndrome, determines female sex. (d) Homozygous sex chromosomes (XX) produce male in Drosophila.
Last Answer : (b) XO type of sex chromosomes determine male sex in grasshopper.
Description : If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is (a) 0 (b) 0.5 (c) 0.75 (d) 1.
Last Answer : a) 0
Description : An organism with two identical alleles is (a) dominant (b) hybrid (c) heterozygous (d) homozygous.
Last Answer : (d) homozygous.