n the zygote, the unpaired chromosomes Multiple Choice combine to form one set of 23 paired chromosomes. determine how the genes will be expressed. die off. dominate the process of conception.
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The question is about the behavior of unpaired chromosomes in a zygote, which is the cell formed by the fusion of a sperm and an egg cell during fertilization. Show more…
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Why are two children born to the same parents (not identical twins) unlikely to have the same genetic makeup? A) Crossing-over recombines portions of sister chromatids. B) Fertilization provides a new pairing of chromosomes. C) Each sperm or egg has a random assortment of chromosomes, half from each pair. D) Chromosomes align themselves independently during meiosis I. E) All of the answer choices lead to genetic differences among siblings. You are examining a cell under the microscope that is undergoing cell division and cannot find any asters. What else would be absent in this cell? A) a cell plate B) centrosomes C) a spindle D) a cleavage furrow E) chromosomes Meiosis results in a change in chromosome number indicated by A) 2n to 2n. B) 2n to n. C) n to 2n. D) n to n. E) 2n to 2n in diploid organisms, n to n in haploid. Which of the following is a correct association? A) cytokinesis-division of the chromosomes B) centromere-forms spindle fibers during prophase C) haploid-having two copies of each chromosome D) sister chromatids-two identical chromosome strands still attached at the centromere E) mitosis-when a cell duplicates and then divides twice to reduce chromosome number by half In humans, the diploid number of chromosomes is A) 20. B) 46. C) 23. D) variable depending on whether male or female. E) 92. Which of the following best describes the role of histones? A) Histones play a role in coding for hereditary features. B) Histones make RNA synthesis possible. C) Histones are responsible for packaging the DNA so it can fit into a small space. D) Histones are not thought to play any role in the cell. E) Histones determine the diploid number of chromosomes.
Adi S.
To reproduce sexually, an organism must create haploid cells, or gametes, from diploid cells in animals, fuse with the mother's haploid cells, called eggs. Cell fusion produces a diploid cell called a zygote, which undergoes many rounds of cell division to create the entire body of the new individual. The cells produced from the initial fusion event include somatic cells that form most of the tissues of the body as well as the germ-line cells that give rise to the next generation of progeny. Allele, bivalent, germ, pedigree, pollen, meiosis, gametes, somatic, eggs, zygote, mitosis, sperm.
Madhur L.
Draw the chromosomes of the zygote you have created from the combination of one of your four daughter cells from Activity 8D with one of the four daughter cells from Activity 8D at the table across from you. Indicate the P and p alleles, and indicate the S and s alleles. How many chromosomes are in your zygote? Are there homologous pairs of chromosomes in your zygote? If so, how many homologous pairs are there? Would the cell that has these chromosomes be a diploid cell or a haploid cell? (Pick one!) What is the diploid number for this cell? What is the haploid number for this cell? If the zygote were to undergo mitosis, would the resulting daughter cells be diploid or haploid? (Pick one!) If the zygote were to undergo meiosis, would the resulting daughter cells be diploid or haploid? (Pick one!) How many kernel color alleles are in the zygote nucleus? How many kernel texture alleles are in the zygote nucleus? Which specific kernel color and kernel texture alleles are in the zygote? Disassemble your pop bead chromosomes and return them to where they were stored.
Supreeta N.
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