Description : Genes are not found in pairs - (1) in body cells (2) in ovary after fertilization (3) in gametes (4) in zygotes
Last Answer : (3) in gametes Explanation: Genes are a part of the chromosome and are found in pairs in somatic cells. One member of the gene pair segregates into a gamete, thus each gamete only carries one member of the gene pair. Gametes unite at random and irrespective of the other gene pairs involved.
Description : What happens at fertilization after gametes experiance meiosis?
Last Answer : The development of a new progeny organism is then initiated by the fusion of these gametes at fertilization
Description : If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from (a) testes to epididymis (b) epididymis to vas deferens (c) ovary to uterus (d) vagina to uterus.
Last Answer : (a) testes to epididymis
Description : The gametes taking part in double fertilization are
Last Answer : The gametes taking part in double fertilization are A. 5 B. 4 C. 3 D. 2
Description : Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion
Last Answer : (4) Syngamy and triple fusion
Description : Which of the following is not a characteristic of coniferales........ a)pycnoxylic wood b)motile male gametes c)presence of resin canal d) fertilization siphonogamous
Last Answer : b)motile male gametes
Description : 9) The process of development of ovary into fruit without fertilization is c) parthenogenesis d) parthenocarpy c) apomixis d) Apospory
Last Answer : 9.b parthenocarpy
Description : Fertilization of the ovum by the sperm usually occurs in the: a) oviduct b) vagina c) uterus d) ovary
Last Answer : ANSWER: A -- OVIDUCT
Description : Gametes have a. homologous chromosomes. b. twice the number of chromosomes found in body cells. c. two sets of chromosomes. d. one allele for each gene.
Last Answer : d. one allele for each gene.
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 : Transposons are of particular significance because they a. often contain genes for antibiotic resistance. b. inhibit the effects of overlapping genes. c. come in pairs and often are associated with viruses. d. regulate gene transcription in bacterial cells.
Last Answer : a. often contain genes for antibiotic resistance.
Description : Total number of meiotic divisions required for forming 100 zygotes/100 grains of wheat is (a) 100 (b) 75 (c) 125 (d) 50
Last Answer : (c) 125
Description : Complete the sentence. _____ Twins develop from separate zygotes and therefore differ genotypically and phenotypically.
Last Answer : ANSWER: FRATERNAL
Description : An epithelial tissue which has thin flat cells, arranged edge to edge so as to appear like closely packed tiles, is found to be present at (a) outer surface of ovary (b) inner lining of Fallopian tube (c) inner lining of stomach (d) inner lining of cheeks.
Last Answer : (d) inner lining of cheeks.
Description : Given below is an incomplete table on hormones, their source glands and one major effect of each human body. Identify the option representing correct grouping of hormone its gland and ... hormone (b) Placenta Insulin Vasopressin (c) Ovary Insulin Calcitonin (d) Placenta Glucagon Calcitonin
Last Answer : (a) Ovary Glucagon Growth hormone
Description : $ Those two pairs of genes which if present in dominant stage, do not produce any expression but when present collectively in dominant stage, produce
Last Answer : $ Those two pairs of genes which if present in dominant stage, do not produce any expression but when ... wrong D. If both As and R are wrong.
Description : What are the structures called that give an appearance as ‘beads-on-string’ in the chromosomes when viewed under electron microscope? (a) Genes (b) Nucleotides (c) Nucleosomes (d) Base pairs
Last Answer : Nucleosomes
Description : Assertion : Simple cuboidal epithelium is also called as germinal epithelium Reason : Cuboidal cells of gonads forms gametes
Last Answer : Assertion : Simple cuboidal epithelium is also called as germinal epithelium Reason : Cuboidal cells of ... . If both Assertion & Reason are false.
Description : Assertion : Simple columner epithelium is also called as Germinal epithelium. Reason : Columnar cells of gonads forms gametes .
Last Answer : Assertion : Simple columner epithelium is also called as Germinal epithelium. Reason : Columnar cells of ... D. If both Assertion & Reason are false.
Description : In angiosperms, pollen tube liberate their male gametes into the (a) central cell (b) antipodal cells (c) egg cell (d) synergids.
Last Answer : d) synergids.
Description : An animal has 80 chromosomes in its gametes, how many chromosomes would you expect to find in this animal's brain cells? (A) 120 (B) 240 (C) 40 (D) 160
Last Answer : (D) 160
Description : What genes are located in these bundles that are found in the nucleus of most cells are?
Last Answer : Chromosomes
Description : Proto-oncogenes are: B A. DNA sequences in cells that are oncogenes themselves B. Cellular copies of genes that were first found in oncogenic retroviruses C. DNA viral sequences that are known to infect human cells D. Bacterial DNA counterparts
Last Answer : Cellular copies of genes that were first found in oncogenic retroviruses
Description : The following are true : a. the HLA proteins are found within the cytoplasm of the cells b. HLA class I antigens are expressed on all cells with nuclei c. HLA class II antigens presents ... on chromosome 6 e. HLA tissue typing is carried out in all forms of transplantation to prevent rejection
Last Answer : HLA class I antigens are expressed on all cells with nuclei
Description : Which type of cells starts to develop about 17 days after fertilization?
Last Answer : Heart
Description : Assertion (A) : Cancer cells are virtually immortal until the body in which they reside dies. Reason`(R)`: Cancer is caused by damage to genes regulat
Last Answer : Assertion (A) : Cancer cells are virtually immortal until the body in which they reside dies. Reason ... D. If both the assertion and reason are false
Description : Antioxidants help a person maintain good health because they (a) prevent the vitamins deficiency. (b) prevent excessive oxidation of glucose and other carbohydrates. (c) neutralise the free radicals ... metabolism. (d) activate certain genes in the body cells which help delay the ageing process.
Last Answer : Ans:(c)
Description : Consider the following methods by which gene therapy can be performed: 1. By introducing a new gene into the body 2. By the use of stem cells 3. By delivery of genes using gold nanoparticles The correct methods could be: (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3 only
Last Answer : Ans:(a)
Description : Assertion : Corpus albicans is an inactive structure which is found in the ovary . Reason : Corpus albicans secretes the progesterone hormone after ov
Last Answer : Assertion : Corpus albicans is an inactive structure which is found in the ovary . Reason : Corpus ... D. If both Assertion & Reason are False.
Description : Isogamous condition with non-flagellated gametes is found in (a) Volvox (b) Fucus (c) Chlamydomonas (d) Spirogyra.
Last Answer : (d) Spirogyra.
Description : How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY? a. 2 b. 4 c. 8 d. 16
Last Answer : a. 2
Description : Identify the correct statement on inhibin'. (a) Is produced by granulosa cells in ovary and inhibits the secretion of LH (b) Is produced by nurse cells in testes and inhibits the secretion of LH ... , FSH and prolactin (d) Is produced by granulosa cells in ovary and inhibits the secretion of FSH
Last Answer : (d) Is produced by granulosa cells in ovary and inhibits the secretion of FSH
Description : Select the incorrect statement. (a) LH and FSH decrease gradually during the follicular phase. (b) LH triggers secretion of androgens from the Leydig cells. (c) FSH stimulates the Sertoli cells which help in spermiogenesis. (d) LH triggers ovulation in ovary.
Last Answer : (a) LH and FSH decrease gradually during the follicular phase.
Description : Location and secretion of Leydig’s cells are (a) liver-cholesterol (b) ovary-estrogen (c) testis-testosterone (d) pancreas-glucagon.
Last Answer : (c) testis-testosterone
Description : Occurrence of Leydig’s cells and their secretion is (a) ovary and estrogen (b) liver and cholesterol (c) pancreas and glucagon (d) testis and testosterone.
Last Answer : d) testis and testosterone.
Description : Select the option which correctly matches the endocrine gland with its hormone and its function. Endocrine Hormone Function gland (a) Placenta Estrogen Initiates secretion of the milk (b) Corpus ... of sperms (d) Ovary FSH Stimulates follicular development and the secretion of estrogens
Last Answer : (c) Leydig’s Androgen Initiates the cells production of sperms
Description : Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. Reason: the plant body of the monera, fungi,a
Last Answer : Assertion: Several organisms belonging to monera,fungi,algae and bryophytes produces gametes by mitosis. ... , fungi,algae and bryophytes is haploid.
Description : Are cells that exit meiosis immediately capable of fertilization?
Last Answer : At the end of meiosis, haploid cells are produced. These cells need to further develop into mature gametes capable of fertilization, a process called gametogenesis.
Description : Could be found in the ovary?
Last Answer : Feel Free to Answer
Description : Which one of the following is found only in women? (1) Thyroid (2) Pituitary (3) Ovary (4) Adenoid
Last Answer : (3) Ovary Explanation: Men don't have ovaiy. Women have a pair of ovaries which is a sexual gland responsible for producing estrogen. In men, testis has same functions as ovary in women. it produces testosterone.
Description : Which one of the following is found only in women ? (1) Thyroid (2) Pituitary (3) Ovary (4) Adenoid
Last Answer : Ovary
Last Answer : of the human body Each 23 pairs in body cells Chromosome Stays
Description : Regarding the human chromosomes a. there are 23 pairs autosomal chromosomes b. the Y chromosome is larger than the X chromosome c. cells containing YO chromosome are not compatible with life d. Barr body is caused by the presence of an inactive X chromosome
Last Answer : cells containing YO chromosome are not compatible with life
Description : If you were seeking to get pregnant via in vitro fertilization, what would you do if you found out that the wrong embryos were implanted?
Last Answer : I'm assuming that since I'm using in vitro, it's been hard for me to conceive. I'd let it go and keep the embryos that were implanted - the universe has a way of making these things happen even if ... want to see what kind of a relationship she'd want with me, the babies (if they are born), etc.
Description : Double fertilization is found in: (a) Bryophytes (b) Angiosperms (c) Gymnosperms (d) Pteridophytes
Last Answer : Ans. ((b))
Description : Gene gun can introduced genes into cells with the help of
Last Answer : Gene gun can introduced genes into cells with the help of A. Plasmids B. Cosmide C. Microscopic pellets D. Moringa
Description : What is the threadlike structures in the nucleus of cells that contain genes?
Description : If one or more of these mutations occurs in the genes of reproductive cells how might the traits of offspring be affected?
Last Answer : Need answer
Description : Where does the replication of mutated genes occur in human cells?
Description : All the following statements about hormones are true except (A) All of them require specific carriers in plasma (B) All of them require specific receptors in target cells (C) Some of them are subject to feedback regulation (D) Some of them increase the transcription of certain genes
Last Answer : Answer : A