7. Tomato has a diploid chromosome number of 24. How many chromosome would be expected in: a. microspore mother cell? b. a leaf cell? an endosperm cell? d. an egg nucleus? a sperm nucleus? С. е.
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- 8. Each arrow points to the upper left corner of 1 cell. These cells are part of the root tip (a non-reproductive part of the plant). which cells are diploid? Select all that apply: Group of answer choices C B A D5. Using the illustrations above, arrange the following statements to explain the process of pollen formation in angiosperms. (Microsporogenesis) A. A diploid sporogenous cells differentiate as microsporocytes (pollen mother cells or meiocytes) which divide by meiosis to form four haploid nucleus. B. Distinct single-celled haploid microspores form after cytokinesis.6. Based on your observation of the stigma of the daylily flower in the photo at the right, how many carpels would you expect to comprise the ovary? (1x) Photo by J. W. Perry.
- 6. Compose an argument to defend whether offspring of strawberry plants or spinach plants would be more genetically diverse. For your argument, assume that strawberry plants use a form of reproduction called runners (see Figure 1) and that spinach plants reproduce through sexual reproduction. Figure 1. A drawing and picture of strawberry plant runners In your response, Font FIG. 56.-RUNNER OF THE STRAWBERRY. runner • Describe the cause-and-effect relationships between the type of reproduction and the resulting genetic variation of the offspring as compared to each other and the parent(s). • Use evidence and scientific reasoning to support your argument. • You may support your argument with one or more models (for example: labeled diagrams and/or one or more Punnett squares) Size Ω A A ▼ BIUS X₂ runner 99 ==no need to explain just need to know if its a,b,c or d 1.) The life cycles of some plants contains two alternating generations of adults. The diploid adult is called the sporophyte generation and the haploid adult is the gametophyte generation. The diploid plants of the sporophyte generations produce spores by the process of: a.) amitosis b.) meiosis c.) mitosis d.) binary fission 2.) A scientist was examining a human cell with 22 pairs of autosomes, an X chromosome and a Y chromosome. What conclusions can we drawn about the cell? a.) It is a somatic, diploid and male cell. b.) It is a somatic, diploid and female cell. c.) It is a gametic, haploid and male cell. d.) It is a gametic, diploid and male cell. 3.) What will be the number of chromosomes in Turner’s syndrome and Klinefelter's syndrome of an organism whose haploid number is 20? a.) 39 in Turner’s syndrome and 41 in Klinefelter’s syndrome b.) 41 in Turner’s syndrome and 39 in Klinefelter’s syndrome c.) 19 in Turner’s…1. Meiosis practice with ascospores The life cycle of the fungus Sordaria fimicola begins in the haploid state. After two different types of strains combine, they develop a diploid nucleus. As the life cycle continues, the diploid nucleus undergoes meiosis (2 cell divisions, remember?) followed by mitosis (a trick the fungi do to make more mileage out of the mating). This produces eight haploid ascospores which are stored in a sac called an ascus. The spores line up in a way that shows these cell divisions. After the spores have matured, the sac will burst, allowing the ascospores to be released. These spores are haploid and thus begin the life cycle again. Sordaria fimicola is often used to observe crossing over because the wild type strain has black ascospores and the mutant type has tan ascospores. When a combination of the two strains go through meiosis, the location of the ascospores will directly show if crossing over has occurred. The below pictures shows a fruiting body with…
- 2. The endosperm of maize can either be yellow or white. This endosperm color is governed by a gene with two alleles, Y has yellow endosperm and y has white endosperm. However, this endosperm color is masked when the aleurone is colored purple. A true-breeding maize line with the color inhibitor and yellow endosperm (C'C'YY) (so they were yellow) was crossed to a true-breeding line with purple aleurone (and white endosperm) (CCyy). The F1 were crossed and you have been given the results of this cross. What is your proposed phenotypic and genotypic ratio for the offspring (kernels) of this cross? Perform a Chi-square to prove or disprove this ratio.Q.No.1. A 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. X V Y Synergids W P Tube nucleus Antipodals Which of the nuclei in the pollen grain would contain genetically identical sets of chromosomes? Which of the nuclei in the embryo sac would be chromosomally and genetically equivalent? Which of the nuclei in these two gametophytes will have no descendents in the mature seed?28. ...... the process where portions of homologous chronosomes exchange segments occurs in A. Meiotic overlap, tetrad B. Clonal exchange, meiosis I C. Homologous exchange, mitosis D. Crossing over, meiosis II E. Independent assortment, meiosis II F. Crossing over, meiosis I
- 1. Down Syndrome (trisomy 21) is caused by an error in meiosis which results in the presence of three chromosome #21s in the individual affected. In what two phases of meiosis could this error occur and, in general, HOW does it occur? 2. You are exploring a new planet when you discover a hexaploid (6n) organism. What is the ploidy of the gametes of wheat after meiosis and cytokinesis (what does 6n become)? 3. If a somatic cell has a diploid number of 4, what would be the result in the final daughter cells after cytokinesis IF in Anaphase, one of the chromosomes did not have a separation of sister chromatids? That is, if the sister chromatids of ONE of the chromosomes stayed together, what would be the chromosome number of each daughter cell? What problems might be caused by this happening?12.In a zygote that begins with a complement of two homologous chromosomes pairs, A and a, and B and b: a.What chromosome compliments would you find in each somatic cells during growth? b.What combinations chromosomes would you expect to find in the gametes if the individual becomes an adult?104. Types of gametes formed by the plant with genotype AABbccDdee :- (1) 2 (2) 4 (3) 32 (4) 64