Explain how the random nature of independent assortment contributes to diversity of zygotes, even though each receives half its DNA from mom and half from dad.
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Explain how the random nature of independent assortment contributes to diversity of zygotes, even though each receives half its DNA from mom and half from dad.
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- In plant trichomes, is there a prominent nucleus? Is the trichome septate?In embryophytes, especially spermatophya, what is the difference between a "sporocyte" (e.g., megasporocyte) and the actual spore (e.g., megaspore)? a) Meiosis: Megasporocyte is still diploid, megaspore haploid b) Mitosis, number of nuclei: Megaspore has eight cell nuclei, megasporocyte only one c) Cytokinesis: Megasporocyte has only one cell, Megaspore can have several (as endosporic gametophyte). d) None: the two terms are synonymous. e) Meiosis: Megaspore is still diploid, megasporocyte haploidWhen the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. A fungus with white spores cross fertilizes a fungus with black spores. If 10% of the progeny bear white spores while 90% of the progeny bear black spores, what must be true? A. The trait for spore color is determined by exactly one gene. B. The trait for spore color is determined by more than one gene. C. The allele for black spores is dominant over that for white spores. D. The allele for white spores is dominant over that for black spores.
- Species A and B are closely related. Species A has 2n = 12 chromosomes, and species B has 2n = 16 chromosomes. How many chromosomes would be found in the somatic cells of an allotetraploid? 56 38 20 28 14When the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. Based on the diagram, how many unique ascospores are produced in each ascus resulting from the cross fertilization of two Ascomycetes fungi? A. 1 B. 2 C. 4 D. 8Describe the process that results in the formation of a tetrad.
- During which of the following steps does is genetic diversity produced? Mark all that apply. During prophase of mitosis During prophase I of meiosis During prophase II of meiosis During anaphase I of meiosis During fertilizationAs shown gives the number of chromosomes in a haploid set of chromosomes. What is the lowest number in the table? What is the highest number? Most cells in plants are diploid, having two sets of chromosomes,so the number per nucleus should be doubled. How many chromosomes are present in each diploid potato nucleus? If a potato plant has 1 million cells, each with one diploid nucleus, how many chromosomes are present in the entire plant?X-value 0.95 0.84 2.72 7.83 Y-value 0.86 0.84 0.8 0.73
- When the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. Although ascospores are produced by mitotic division, none of the spores develop into fungi that are identical to either parental hyphae. What is the BEST explanation for this observation? A. The spores inherit half their genes from each parent. B. The spores inherit haploid nuclei from their parents. C. The spores inherit mutations as a result of meiosis. D. The spores inherit mutations as a result of mitosis.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 organismWhich of the following statements does BEST compare the processes of mitosis and meiosis? Group of answer choices Mitosis involves two division cycles and results in haploid gametes, while meiosis consists of one division cycle and results in a diploid daughter cell Mitosis involves two division cycles and results in diploid daughter cells, while meiosis consists of one division cycle and results in haploid gametes. Mitosis involves one division cycle and results in diploid daughter cells, while meiosis consists of two division cycles and results in haploid gametes. Mitosis involves one division cycle and results in haploid gametes, while meiosis consists of two division cycles and results in diploid daughter cells.