What are the specialized cells—eggs within the ovules of the female parent and sperm cells within the pollen grains—that carry genes between generations?
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What are the specialized cells—eggs within the ovules of the female parent and sperm cells within the pollen grains—that carry genes between generations?
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- What is the difference between the haploid and diploid number?Plant breeders use colchicine to A) prevents cytokinesis in somatic cells B) increase the occurrence of unequal crossing over events during meosis C) stop the segregation of homologous chromosomes during meiosis D)  triggers the production of haploid gametes and diploid organismA pollen of maize with nuclei labeled P, Q and R fertilized an embryo sac with nuclei labeled S, T, U, V, W, X, Y and Z as shown here. R V Y Synergids U W P Tube nucleus Antipodals Which of the following combinations could be found in the embryo? i) PQR, ii) QRY, iii) VWQ, iv) RY Which of the above combinations could be found in the aleurone layer of the seed? Which of the above combinations could be found in the germinating pollen tube?
- why is it important for germ cells to be haploid?If the diploid number of a corn is 20, how many chromosomes are present in the nucleus of each pollen grain, sperm cell, and egg cell?In a particular plant species, 2n=12. For this organism, how many chromosomes, and how many DNA molecules will be present per cell for each of the following? e) root meristem cell in telophase of mitosis (cytokinesis complete) f) microspore mother cell (in anther) in prophase 1 of meiosis g) microspore mother cell in metaphase II of meiosis h) pollen grain ( after meiosis is and cytokinesis complete)
- Each sperm of a tomato plant contains seven chromosomes. What are the haploid and diploid number for tomatoes? haploid=7 and diploid=14 haploid=14 and diploid=7 haploid=7 and diploid=49 haploid=3 and diploid=73) At the completion of meiosis, how many sets of chromosomes does each daughter cell contain? 1 2 3 4 4) Imagine that a cell within a tissue is expressing a protein that leaves the cell and can “signal” to other cells. Which cells will respond? A) Cells that are within range of the signaling molecule and have protein receptor that binds the signaling molecule B) Cells that are within range of the signaling molecule C) Cells that are within range of the signaling molecule and are expressing their own signaling molecules D) Cells that are within range of the signaling molecule and are the same type of cellWhat is the genetic basis of the wrinkled phenotype of pea seed?
- If meiosis of a diploid organism produces haploid cells, then how is a diploid offspring generated? a) Crossing over between two haploid gametes b) DNA replication in haploid gametes c) fertilization involving two haploid gametes d) Independent assortment of haploid gametesWhat is haploid (n) ?What is the reason behind the event that a zygote receives half of the chromosome from the parents?