mitosis but not cytokinesis. The result would be Student Response Value A. daughter cells that are unusually small. B. a cell with two nuclei. 100% C. a cell with one nucleus containing twice the normal number of chromosomes. D. daughter cells with too few chromosomes. E. daughter cells with no nucleus. Score: 1/1 7. Which of the following is the correct order of events in the cell cycle? Student Response Value A. S‚ G1‚ G2‚ cytokinesis‚ mitosis B. S‚ G1‚ G2‚ mitosis
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up what are now called chromosomes. The first major discovery grew out of work on various species of insects. A cell’s chromosomes normally come in identical pairs‚ except for the chromosomes scientists called X and Y. Females always have two X chromosomes. Males of some species have one X and one Y‚ but in other species males have only a single X chromosome. Scientists quickly realized that the X and Y (or lack of it) determine the individual’s sex. But did these chromosomes have other functions as
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which a cell duplicates the chromosomes in its cell nucleus in order to generate two identical daughter nuclei. • Interphase: This particular stage is divided into three phases‚ G1 (first gap)‚ S (synthesis)‚ and G2 (second gap). During all three phases‚ the cell grows by producing proteins and other organelles within the cytoplasm. However‚ chromosomes are replicated only during the S phase. In all‚ a cell grows (G1)‚ continues to grow as it duplicates its chromosomes (S)‚ grows more and prepares
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WHAT IS A CELL? It is the smallest unit of life that is classified as a living thing‚ and is often called the building block of life. The cell is the basic structural and functional unit of all known living organisms. Some organisms are unicellular (made of only one cell) while others are multicellular (made up of several cells). The word cell comes from the Latin cellula‚ meaning‚ a small room. The term was coined by Robert Hooke in a book he published in 1665 when he compared the cork cells he
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allele that only has an effect on the phenotype when present in the homozygous state. * Co-dominant alleles- pairs of alleles that both affect the phenotype when present in a heterozygote. * Locus- the particular position on homologous chromosomes of a gene * Homozygous- having two identical alleles of a gene * Heterozygous-having two different alleles of a gene * Carrier- an individual that has one copy of a recessive allele that causes a genetic disease in individuals that are
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Biology‚ 7e (Campbell) Chapter 15: The Chromosomal Basis of Inheritance Chapter Questions 1) Chromosomes and genes share all of the following characteristics except that A) they are both present in pairs in all diploid cells. B) they both undergo segregation during meiosis. C) their copy numbers in the cell decrease after meiosis‚ and increase during fertilization. D) they are both copied during the S phase of the cell cycle. E) they both pair up with their homologues during
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1-2/100‚000 1.6/100‚000 ------------------------------------------------- COL1A2 7q21.3 ------------------------------------------------- Footnotes ------------------------------------------------- * Location of the gene on the chromosome -------------------------------------------------
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The history of fruit flies is considered a tradition. Research of these flies initially entered labs 100 years ago. Thomas Hunt Morgan‚ who lived from 1866 to 1945‚ was the founder of drosophila genetics. Thomas preformed his research in Morgan lab at the Columbia University in 1910. Here was when they found a famous mutation‚ know as the white-eyed fly. Quite an accomplishment was this discovery‚ but the end of the 1980’s there were 3‚000+-recorded mutations. Now drosophila is very popular; so popular
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microscope to examine the size‚ shape‚ And number of Chromosomes in a sample of body cells. Extra‚ missing‚ Or abnormal positions of chromosome pieces can cause problems with a persons growth‚ development‚ and body functions. In karyotyping‚ the chromosomes in a cell are stained with a dye to make the bands of each chromosome visible. Banding helps show differences in structure among the chromosomes and helps arrange them into pairs. The chromosomes are then photographed through the microscope. The
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following math problems. Use the space below each problem or a separate piece of paper to show your work. 1. 1201 OOD Answer: ’1000j of) rbe- 1000 A typical human-body cell has 46 chromosomes. If half of them come from each parent‚ how many chromosomes does each parent contribute? Answer: ;)3 C\lvorno5(-J/u.W x 000 GO see.‚ ( see 2. 4. The red bone marrow in a human’s bones produces about 2‚000‚000 red blood cells every second. How many red blood cells are produced in 1 minute? If a young
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