Description : In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F1 generation? (a) 9 : 1 (b) 1 : 3 (c) 3 : 1 (d) 50 : 50
Last Answer : (d) 50 : 50
Description : When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, all the offspring were tall because a. the allele for tall plants is recessive. b. the allele for short plants is dominant. c. the allele for tall plants is dominant. d. they were true-breeding like their parents.
Last Answer : c. the allele for tall plants is dominant.
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 : 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 : 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 : If a pea plant that is heterozygous for round, yellow peas (RrYy) is crossed with a pea plant that is homozygous for round peas but heterozygous for yellow peas (RRYy), how many different phenotypes are their offspring expected to show? a. 2 b. 4 c. 8 d. 16
Last Answer : a. 2
Description : When Mendel crossed a true-breeding short plant with a true-breeding tall plant, all the offspring were tall. Which term describes the gene for tallness?
Last Answer : Dominant.
Description : In which generation were recessive traits hidden in all the plants in Mendel and his experiments?
Last Answer : Need answer
Description : When Mendel used pea plants true breeding for yellow peas or green peas in an experiment. All the offspring produced from this cross were yellow. When the offspring were allowed to self pollinate one?
Last Answer : yyYy
Description : How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments? (a) Eight (b) Seven (c) Five (d) Six
Last Answer : b) flower position
Description : When white -flowered plant were crossed with pure red - flowered plants, the progeny were - (a) White flowered (b) Red flowered (c) Exhibiting 3:1 ratio of red to whiteflowered plants (d) Exhibiting 1:1 ratio of red to whiteflowered plants
Last Answer : Ans:(b)
Description : What is heterozygous? -Biology
Last Answer : answer:
Description : Difference between homozygous and heterozygous. -Biology
Description : Why are heterozygous individuals called carriers? -Biology
Description : Why is the heterozygous condition important -Biology
Description : Why can't an organism be heterozygous recessive? -Biology
Description : A pair of alleles is said to be heterozygous when -Biology
Description : How did gregor mendel make sure that the plants with round seeds did not self pollinate?
Last Answer : He allowed plants whose seeds were round or wrinkled in shape toself pollinate. This trait has two variations-either round orwrinkled seeds.
Description : How did Mendel obtain pure or true breeding varieties of the contrasting forms of pea plants?
Last Answer : Mendel obtained pure or true breeding varieties of pea plants by allowing them to self pollinate for several generations.
Description : Mention the reasons as to why Mendel selected pea plants for his experiments.
Last Answer : a) Pea plants can be grown easily in open ground or even in pots. b) They have a short growth period and life cycle. c) They give self-pollinating flowers and also it is easy to ... number of seeds. e) They show contrasting heritable characters. f) They produce fertile hybrids on cross pollination.
Description : In his classic experiments on pea plants, Mendel did not use (a) seed shape (b) flower position (c) seed colour (d) pod length.
Last Answer : (d) pod length.
Description : Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination.
Last Answer : c. the inheritance of traits.
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 : A tall plant is crossed with a short plant. If the tall F1 pea plants are allowed to self-pollinate, a. the offspring will be of medium height. b. all of the offspring will be tall. c. all of the offspring will be short. d. some of the offspring will be tall, and some will be short.
Last Answer : d. some of the offspring will be tall, and some will be short.
Description : What do you mean by heterozygous ?
Last Answer : : An organism derived from a homozygot is called a homozygous ; Again the opposite means consisting of individual features [e.g. T and t] The hybrid zygote produced by the union of two gametes is called heterozygote
Description : What is Heterozygous ?
Last Answer : reverse i.e. with individual features [e.g. The hybrid zygote produced by the union of two gametes, T and t] , is called heterozygote, and the heterozygotic organism is called heterozygous.
Last Answer : Heterozygous is a condition that occurs when one of the two genes is exposed and the other is exposed.
Description : In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by
Last Answer : In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by A. pq B. `q^(2)` C. `p^(2)` D. 2pq
Description : Do all heterozygous pairs alleles produce an intermediate phenotype?
Last Answer : No
Description : What is the probability that two heterozygous parents would have an offspring that produced round seeds (Express your answer as a ratio.)?
Last Answer : What is the answer ?
Description : If the pattern of inheritance for a trait is complete dominance then an organism heterozygous for the trait would normally express what?
Description : If yellow flower color is dominant to blue flower color what will plant that is heterozygous be?
Description : Is DD heterozygous or homozygous?
Last Answer : homozygous
Description : In fruit flies long wings are dominant to short wings. Cross a heterozygous long winged fruit fly with another heterozygous long winged fruit fly. what are the expected genotype and phenotype ratios?
Description : What is the difference between a heterozygous phenotype produced by incomplete dominance and a heterozygous phenotype produced by codominance?
Last Answer : http://wiki.answers.com/Q/What_is_the_difference_between_a_heterozygous_phenotype_produced_by_incomplete_dominance_and_a_heterozygous_produced_by_codominance"
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 : Progeny of a single cross fertilized heterozygous individual
Last Answer : Ans. Inbred
Description : Which of the following suggests a diagnosis of familial combined hyperlipidaemia (FCHL) rather than heterozygous familial hypercholesterolaemia (FH)? 1) Tendon xanthomas 2) Presence of glucose ... premature coronary artery disease 4) Presence of arcus senilus 5) Absence of hyperuricaemia
Last Answer : Answers-2 The genetic dislipidaemias occur in one third of patients who have suffered from their first myocardial infarction below the age of 50 years in men. The commonest is familial combined ... xanthomata and arcus cornea are rarely present in children, but are very important signs to identify.
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 : 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 : A male human is heterozygous for autosomal genes A and B and is also hemizygous for haemophilic gene h. What proportion of his sperms will be abh? (a) 1/8 (b) 1/32 (c) 1/16 (d) 1/4
Last Answer : (a) 1/8
Description : A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy (a) may be colour blind or ... colour vision (d) will be partially colour blind since he is heterozygous for the colour blind mutant allele
Last Answer : (a) may be colour blind or may be of normal vision
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 : .Match the terms in column I with their description in column II and choose the correct option. Column I Column II A. Dominance (i) Many genes govern a single character B. Co-dominance (ii) In a heterozygous organism only one allele ... (i) (ii) (c) (ii) (i) (iv) (iii) (d) (ii) (iii) (iv) (i)
Last Answer : (d) (ii) (iii) (iv) (i)
Description : How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AABbCc? (a) Six (b) Nine (c) Two (d) Four
Last Answer : (d) Four
Description : A fruit fly is heterozygous for sex-linked genes, when mated with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion (a) 3 : 1 (b) 7 : 1 (c) 1 : 1 (d) 2 : 1.
Last Answer : (c) 1 : 1
Description : A man of A-blood group marries a woman of AB blood group. Which type of progeny would indicate that man is heterozygous A? (a) AB (b) A (c) O (d) B
Last Answer : B
Description : An organism with two identical alleles is (a) dominant (b) hybrid (c) heterozygous (d) homozygous.
Last Answer : (d) homozygous.
Description : An allele is dominant if it is expressed in (a) both homozygous and heterozygous states (b) second generation (c) heterozygous combination (d) homozygous combination.
Last Answer : (a) both homozygous and heterozygous states
Description : A gene is said to be dominant if (a) it expresses its effect only in homozygous state (b) it expresses its effect only in heterozygous condition (c) it expresses its effect both in homozygous and heterozygous condition (d) it never expresses its effect in any condition.
Last Answer : (c) it expresses its effect both in homozygous and