Mitosis, Meiosis, DNA Notes
... II. Production of Sex Cells A. Meiosis 1. Nuclear division that reduces the number of chromosomes by half. 2. Production of gametes (sex cells: sperm + eggs) 3. Homologous chromosomes – pairs of the same chromosomes a) Humans – 46 chromosomes (23 pairs) b) Diploid – both homologs are present (2N) c ...
... II. Production of Sex Cells A. Meiosis 1. Nuclear division that reduces the number of chromosomes by half. 2. Production of gametes (sex cells: sperm + eggs) 3. Homologous chromosomes – pairs of the same chromosomes a) Humans – 46 chromosomes (23 pairs) b) Diploid – both homologs are present (2N) c ...
Chromosome Theory of Inheritance -States that genes or alleles
... the offspring will have an incorrect chromosome number, this condition is called aneuploidy -Nondisjunction: If chromosomes don’t separate properly during meiosis I or II, gametes will end up with too many or too few chromosomes, leading to chromosomal abnormalities in the ...
... the offspring will have an incorrect chromosome number, this condition is called aneuploidy -Nondisjunction: If chromosomes don’t separate properly during meiosis I or II, gametes will end up with too many or too few chromosomes, leading to chromosomal abnormalities in the ...
File
... Think of a chromosome as a single book in a set of encyclopedias. If you are missing one or more books, you are missing some important information. One chromosome contains only part of the instructions for making a human. ...
... Think of a chromosome as a single book in a set of encyclopedias. If you are missing one or more books, you are missing some important information. One chromosome contains only part of the instructions for making a human. ...
GHSGT Ecology/Genetics Review (EcoGenReview)
... 14. Half of Wendy’s chromosomes came from her mother and half from her father. Few of her chromosomes are identical to those of either parent because most of the genes on them have been exchanged with genes on other chromosomes. What process accounts for this? A. B. C. D. ...
... 14. Half of Wendy’s chromosomes came from her mother and half from her father. Few of her chromosomes are identical to those of either parent because most of the genes on them have been exchanged with genes on other chromosomes. What process accounts for this? A. B. C. D. ...
Chapter 15~ The Chromosomal Basis of Inheritance ______
... If Father has an X-linked condition – His sons can only inherited Ychromosome – His daughters will inherited the faulty X chromosome, 100% chance of being at least carrier ...
... If Father has an X-linked condition – His sons can only inherited Ychromosome – His daughters will inherited the faulty X chromosome, 100% chance of being at least carrier ...
Exam Week
... – Explains what is and the history of the human genome project and explain multiple uses including its importance in the field of medical research ...
... – Explains what is and the history of the human genome project and explain multiple uses including its importance in the field of medical research ...
Meiosis
... 1. autosomes 2. sex chromosomes 3. products of meiosis 4. nature of sperm determines sex • 5. sex ratios ...
... 1. autosomes 2. sex chromosomes 3. products of meiosis 4. nature of sperm determines sex • 5. sex ratios ...
Chapter Three The Biological Basis of Life
... Since the DNA molecules have replicated, one strand of a chromosome is an exact copy of the ...
... Since the DNA molecules have replicated, one strand of a chromosome is an exact copy of the ...
meiosis - RIScienceTeachers
... This is a good idea if you’re going to combine two cells to make a new organism. This trick is accomplished by halving chromosome number. In meiosis, one diploid cells produces four haploid cells. ...
... This is a good idea if you’re going to combine two cells to make a new organism. This trick is accomplished by halving chromosome number. In meiosis, one diploid cells produces four haploid cells. ...
Lecture #6 Date - Simon Technology
... Sex-Linked Disorders: Color-blindness; Duchenne muscular dystropy (MD); ...
... Sex-Linked Disorders: Color-blindness; Duchenne muscular dystropy (MD); ...
Name
... (5) Define and distinguish between heterochromatin and euchromatin. heterochromatin is the condensed, gene poor DNA found mainly near centromeres and telomeres euchromatin is the less condensed, gene rich DNA where most genes are transcribed (5) Define and distinguish between centromere and telomere ...
... (5) Define and distinguish between heterochromatin and euchromatin. heterochromatin is the condensed, gene poor DNA found mainly near centromeres and telomeres euchromatin is the less condensed, gene rich DNA where most genes are transcribed (5) Define and distinguish between centromere and telomere ...
Genetic disorder/testing PPT
... • Caused by mutations on chromosomes 13/17 ( genes BRCA1 and BRCA2) • What are my choices Frequent mammograms and breast exams Surgery to remove a tumor or the whole breast ...
... • Caused by mutations on chromosomes 13/17 ( genes BRCA1 and BRCA2) • What are my choices Frequent mammograms and breast exams Surgery to remove a tumor or the whole breast ...
Name: Date: Period:_____ Midterm Review: Study Guide # 3
... How many chromosomes are in the sex cells of a human egg or sperm? 23 Why is the process of meiosis important to organisms? When a sperm and an egg unite there are the original number of chromosomes for the organsim ...
... How many chromosomes are in the sex cells of a human egg or sperm? 23 Why is the process of meiosis important to organisms? When a sperm and an egg unite there are the original number of chromosomes for the organsim ...
Name: Hour
... •In order to keep the number of chromosomes the same from generation to generation, the _________________ have to reduce the number of chromosomes to one half of the number that you find in a somatic cell (body cell) ...
... •In order to keep the number of chromosomes the same from generation to generation, the _________________ have to reduce the number of chromosomes to one half of the number that you find in a somatic cell (body cell) ...
Section 6.3- Mendelian Genetics
... This pair controls what sex that organism is going to be. The two possible sex chromosomes are “X” and “Y”. If an organism has “XX” pair, that organism is a female. If an organism has “XY” pair, that organism is a male. If you are a male- your 23rd set of chromosomes are not homologous because they ...
... This pair controls what sex that organism is going to be. The two possible sex chromosomes are “X” and “Y”. If an organism has “XX” pair, that organism is a female. If an organism has “XY” pair, that organism is a male. If you are a male- your 23rd set of chromosomes are not homologous because they ...
chapter12_Sections 1-3 - (per 3) and wed 4/24 (per 2,6)
... contain pairs of chromosomes: one from the mother and one from the father • Except for non-identical (male) sex chromosomes, the two chromosomes of every pair carry the same set of genes ...
... contain pairs of chromosomes: one from the mother and one from the father • Except for non-identical (male) sex chromosomes, the two chromosomes of every pair carry the same set of genes ...
14-1 Human Heredity
... 18. Three copies of an autosomal chromosome is known as ___________________________. 19. The most common form of trisomy is trisomy 21 and is called _______________ _______________________. 20. Give two examples of nondisjunction among the sex chromosomes. ____________________________________ 21. Wh ...
... 18. Three copies of an autosomal chromosome is known as ___________________________. 19. The most common form of trisomy is trisomy 21 and is called _______________ _______________________. 20. Give two examples of nondisjunction among the sex chromosomes. ____________________________________ 21. Wh ...
Chapter 14 Study Guide 1. What is a karyotype and how many
... What is a Barr body? How does it relate to X chromosomes What is nondisjunction? What does it involve? What are conditions involving errors in the X chromosome? What is DNA fingerprinting and how does it work? What is the Human Genome project? How was the human genome sequenced? What is gene therapy ...
... What is a Barr body? How does it relate to X chromosomes What is nondisjunction? What does it involve? What are conditions involving errors in the X chromosome? What is DNA fingerprinting and how does it work? What is the Human Genome project? How was the human genome sequenced? What is gene therapy ...
CHAPTER 10
... • Genetic variation is produced during crossing over and during fertilization when gametes randomly combine. • Depending on how chromosomes line up at the equator, 4 gametes with 4 different combinations of chromosomes can result. • SEXUAL REPRODUCTION VS. ASEXUAL REPRODUCTION • Asexual reproduction ...
... • Genetic variation is produced during crossing over and during fertilization when gametes randomly combine. • Depending on how chromosomes line up at the equator, 4 gametes with 4 different combinations of chromosomes can result. • SEXUAL REPRODUCTION VS. ASEXUAL REPRODUCTION • Asexual reproduction ...
PowerPoint Presentation - Viking Age Information for Primary
... putting together one of the building blocks of the body ...
... putting together one of the building blocks of the body ...
Inheritance PPT
... Called sickle cell because of the shape that the red blood cell takes in the victim. These cells clog capillaries, resulting in decreased oxygen supply to brain, tissues. ...
... Called sickle cell because of the shape that the red blood cell takes in the victim. These cells clog capillaries, resulting in decreased oxygen supply to brain, tissues. ...
Unit 8: Inheritance & Human Genetic Patterns
... A group of genes located on one chromosome. These genes are usually inherited together. Example: ...
... A group of genes located on one chromosome. These genes are usually inherited together. Example: ...
Ploidy
Ploidy is the number of sets of chromosomes in a cell. Usually a gamete (sperm or egg, which fuse into a single cell during the fertilization phase of sexual reproduction) carries a full set of chromosomes that includes a single copy of each chromosome, as aneuploidy generally leads to severe genetic disease in the offspring. The gametic or haploid number (n) is the number of chromosomes in a gamete. Two gametes form a diploid zygote with twice this number (2n, the zygotic or diploid number) i.e. two copies of autosomal chromosomes. For humans, a diploid species, n = 23. A typical human somatic cell contains 46 chromosomes: 2 complete haploid sets, which make up 23 homologous chromosome pairs.Because chromosome number is generally reduced only by the specialized process of meiosis, the somatic cells of the body inherit and maintain the chromosome number of the zygote. However, in many situations somatic cells double their copy number by means of endoreduplication as an aspect of cellular differentiation. For example, the hearts of two-year-old children contain 85% diploid and 15% tetraploid nuclei, but by 12 years of age the proportions become approximately equal, and adults examined contained 27% diploid, 71% tetraploid and 2% octaploid nuclei.Cells are described according to the number of sets present (the ploidy level): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is frequently used to describe cells with three or more sets of chromosomes (triploid or higher ploidy).