PowerPoint
... ANEUPLOIDY • Most autosomal aneuploids are incompatible with life • Autosomal nondisjunction occurs at a reasonable high frequency in humans but the zygote does not develop • Aborts spontaneously soon after conception • Humans do not tolerate aneuploidy well, especially monosomies • Excess of chrom ...
... ANEUPLOIDY • Most autosomal aneuploids are incompatible with life • Autosomal nondisjunction occurs at a reasonable high frequency in humans but the zygote does not develop • Aborts spontaneously soon after conception • Humans do not tolerate aneuploidy well, especially monosomies • Excess of chrom ...
Mitosis - s3.amazonaws.com
... Crossing over in prophase I Random assortment in metaphase I Crossing over is recombination between nonsister chromatids of homologous chromosomes which produces new combinations of parental alleles ...
... Crossing over in prophase I Random assortment in metaphase I Crossing over is recombination between nonsister chromatids of homologous chromosomes which produces new combinations of parental alleles ...
Class Agenda Week of 8-13 Oct 2007
... Researchers at the University of Minnesota have discovered a gene mutation in 11 generations of relatives who descended from Lincoln's grandparents. The gene causes spinocerebellar ataxia type 5, a degenerative neurological disorder that affects coordination, including walking, writing, speaking and ...
... Researchers at the University of Minnesota have discovered a gene mutation in 11 generations of relatives who descended from Lincoln's grandparents. The gene causes spinocerebellar ataxia type 5, a degenerative neurological disorder that affects coordination, including walking, writing, speaking and ...
Chapter 3 – Cell Structure and Function
... - The sequence of nucleotides in DNA creates a code for building proteins. - RNA carries out these instructions, reads the code and puts the amino acids together to make the proteins. Those proteins become traits (hair, eyes, bones) RNA is a nucleic acid like DNA but it is different: - the sugar in ...
... - The sequence of nucleotides in DNA creates a code for building proteins. - RNA carries out these instructions, reads the code and puts the amino acids together to make the proteins. Those proteins become traits (hair, eyes, bones) RNA is a nucleic acid like DNA but it is different: - the sugar in ...
7 1 Sex Linked Traits
... Something to think about…READ it, write a paragraph. When you’re in a crowd, look around at all the different people. Notice their clothes, faces, hair, sizes. Look at their gestures and movements, noticing if they are loose, stiff, or free. Just take it in, without judgment, as if you were lookin ...
... Something to think about…READ it, write a paragraph. When you’re in a crowd, look around at all the different people. Notice their clothes, faces, hair, sizes. Look at their gestures and movements, noticing if they are loose, stiff, or free. Just take it in, without judgment, as if you were lookin ...
BASIC CONCEPTS IN GENETICS
... generation of a family and can affect both males and females, but fathers do not pass mitochondrial traits to their children. • E.g. Leber's hereditary optic neuropathy (LHON) ...
... generation of a family and can affect both males and females, but fathers do not pass mitochondrial traits to their children. • E.g. Leber's hereditary optic neuropathy (LHON) ...
It might, however, be useful to Thus fl^Y
... Microbiol. 42:417-424). Diploids formed between HU-R2, 3, 4 and MS were of intermediate resistance. They were all extremely unstable on CM; each 7-day colony yielded between 5 and 14 large, faster-growing sectors, all of them HU-sensitive. In each case about 90% of the sectors were diploids with the ...
... Microbiol. 42:417-424). Diploids formed between HU-R2, 3, 4 and MS were of intermediate resistance. They were all extremely unstable on CM; each 7-day colony yielded between 5 and 14 large, faster-growing sectors, all of them HU-sensitive. In each case about 90% of the sectors were diploids with the ...
Macroevolution: the evolution of species
... tetraploid. It cannot backcross with parents, but is fertile with a like type. ...
... tetraploid. It cannot backcross with parents, but is fertile with a like type. ...
Centromere position. - Clayton State University
... • Sets of chromosomes originate from different species though usually related • Because of differences between chromosomes, the hybrid, no crossing over occurs and no viable gametes produced making hybrids sterile • Occasionally, tow sets of different chromosomes will double, producing tissues of 2N ...
... • Sets of chromosomes originate from different species though usually related • Because of differences between chromosomes, the hybrid, no crossing over occurs and no viable gametes produced making hybrids sterile • Occasionally, tow sets of different chromosomes will double, producing tissues of 2N ...
Finding a cancer-causing gene
... feature is often determined by a ``gene”, which can take several forms, called its alleles. Each individual inherits an allele from the father and an allele from the mother; one of these two alleles is then randomly passed on to each offspring. When studying the transmission of a disease, the geneti ...
... feature is often determined by a ``gene”, which can take several forms, called its alleles. Each individual inherits an allele from the father and an allele from the mother; one of these two alleles is then randomly passed on to each offspring. When studying the transmission of a disease, the geneti ...
notes - Elko Science
... 1. In each organism, a trait (for example pigment/color) is composed of two alternative states (for example, yellow or green). These alternative states are called alleles. 2. Only one of the alleles is passed on to the offspring. Since an offspring gets an allele from each parent, it ...
... 1. In each organism, a trait (for example pigment/color) is composed of two alternative states (for example, yellow or green). These alternative states are called alleles. 2. Only one of the alleles is passed on to the offspring. Since an offspring gets an allele from each parent, it ...
Chapter 12 Notes
... Color blindness is a sex-linked trait that is carried on the X chromosome. If a boy is born color-blind, what would have to be true? A. His father had normal vision. B. His grandmother was colorblind. C. His mother carried at least one gene for color blindness. D. His grandfather passed on the color ...
... Color blindness is a sex-linked trait that is carried on the X chromosome. If a boy is born color-blind, what would have to be true? A. His father had normal vision. B. His grandmother was colorblind. C. His mother carried at least one gene for color blindness. D. His grandfather passed on the color ...
Taxonomy of plants
... Taxonomy is the science of classification. The aim of biological taxonomy is to name, describe and classify all organisms. The history of plant taxonomy starts with the ancient Greeks. Theophrastus, a student of Aristotle, wrote his famous book ‘Historia Plantarum’ around 300 BC. This is the oldest ...
... Taxonomy is the science of classification. The aim of biological taxonomy is to name, describe and classify all organisms. The history of plant taxonomy starts with the ancient Greeks. Theophrastus, a student of Aristotle, wrote his famous book ‘Historia Plantarum’ around 300 BC. This is the oldest ...
CHAPTER 2 PROBLEMS FOR TEST BANK
... nucleus and formation of a diploid gamete. When fertilized by a normal gamete (haploid), the resulting zygote would be triploid. (b) Polyspermy is occasionally seen, where two sperm fertilize one egg. The two sperm nuclei and the egg nucleus, if all fuse, would yield a triploid. In the complex ferti ...
... nucleus and formation of a diploid gamete. When fertilized by a normal gamete (haploid), the resulting zygote would be triploid. (b) Polyspermy is occasionally seen, where two sperm fertilize one egg. The two sperm nuclei and the egg nucleus, if all fuse, would yield a triploid. In the complex ferti ...
BDOL Interactive Chalkboard - Tanque Verde Unified District
... Why meiosis? • Meiosis consists of two separate divisions, known as meiosis I and meiosis II. • Meiosis I begins with one diploid (2n) cell. • By the end of meiosis II, there are four haploid (n) cells. ...
... Why meiosis? • Meiosis consists of two separate divisions, known as meiosis I and meiosis II. • Meiosis I begins with one diploid (2n) cell. • By the end of meiosis II, there are four haploid (n) cells. ...
Chapter 14
... • In females, nondisjunction can lead to Turner’s syndrome. A female with Turner’s syndrome inherits only one X chromosome (genotype XO). Women with Turner’s syndrome are sterile because their sex organs don’t develop at puberty. • In males, nondisjunction causes Klinefelter’s syndrome (genotype XXY ...
... • In females, nondisjunction can lead to Turner’s syndrome. A female with Turner’s syndrome inherits only one X chromosome (genotype XO). Women with Turner’s syndrome are sterile because their sex organs don’t develop at puberty. • In males, nondisjunction causes Klinefelter’s syndrome (genotype XXY ...
Which statement best states the effect of this movement of the brown
... The population of moths in a forest increased from 100 to 150 members. An ocean ecosystem consists of more algae than fish species. A female cat has a litter of 5 kittens instead of 6. ...
... The population of moths in a forest increased from 100 to 150 members. An ocean ecosystem consists of more algae than fish species. A female cat has a litter of 5 kittens instead of 6. ...
548480Review_guide_ch_5_answers
... a. Both the man and the woman have sicklecell disease b. Both the man and the woman are carriers of sickle-cell disease. c. Only the woman is a carrier of sickle-cell disease. d. Only the man is a carrier of sickle-cell ...
... a. Both the man and the woman have sicklecell disease b. Both the man and the woman are carriers of sickle-cell disease. c. Only the woman is a carrier of sickle-cell disease. d. Only the man is a carrier of sickle-cell ...
12-4 Mutations
... Inversions - reverse direction of parts of a chromosomes Translocations - part of one chromosome breaks ...
... Inversions - reverse direction of parts of a chromosomes Translocations - part of one chromosome breaks ...
Chapter 14
... Most polyploids arise from hybridization of two different species Haploid gametes from two different species combine to produce a sterile hybrid ...
... Most polyploids arise from hybridization of two different species Haploid gametes from two different species combine to produce a sterile hybrid ...
Human Genome Project
... different species. • If the heterokaryon undergoes mitosis, the nuclei fuse. • Human chromosomes are unstable in a mixed nucleus, and most of them are randomly lost. The mouse chromosomes all stay. • Different cell lines can be established that contain different combinations of human chromosomes • Y ...
... different species. • If the heterokaryon undergoes mitosis, the nuclei fuse. • Human chromosomes are unstable in a mixed nucleus, and most of them are randomly lost. The mouse chromosomes all stay. • Different cell lines can be established that contain different combinations of human chromosomes • Y ...
AP Biology Homework Questions: Lesson 2
... 5. Explain what happens during crossing over and when it occurs in meiosis. 6. How is metaphase I different from metaphase of mitosis? 7. What DOES NOT happen between meiosis I and meiosis II? 8. Explain why sexual reproduction increases variation among offspring much more than asexual reproduction ...
... 5. Explain what happens during crossing over and when it occurs in meiosis. 6. How is metaphase I different from metaphase of mitosis? 7. What DOES NOT happen between meiosis I and meiosis II? 8. Explain why sexual reproduction increases variation among offspring much more than asexual reproduction ...
Polyploid
Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes. Most species whose cells have nuclei (Eukaryotes) are diploid, meaning they have two sets of chromosomes—one set inherited from each parent. However, polyploidy is found in some organisms and is especially common in plants. In addition, polyploidy occurs in some tissues of animals that are otherwise diploid, such as human muscle tissues. This is known as endopolyploidy. Species whose cells do not have nuclei, that is, Prokaryotes, may be polyploid organisms, as seen in the large bacterium Epulopicium fishelsoni [1]. Hence ploidy is defined with respect to a cell. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Male bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by meiosis.Polyploidy refers to a numerical change in a whole set of chromosomes. Organisms in which a particular chromosome, or chromosome segment, is under- or overrepresented are said to be aneuploid (from the Greek words meaning ""not"", ""good"", and ""fold""). Therefore the distinction between aneuploidy and polyploidy is that aneuploidy refers to a numerical change in part of the chromosome set, whereas polyploidy refers to a numerical change in the whole set of chromosomes.Polyploidy may occur due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.Polyploidy occurs in some animals, such as goldfish, salmon, and salamanders, but is especially common among ferns and flowering plants (see Hibiscus rosa-sinensis), including both wild and cultivated species. Wheat, for example, after millennia of hybridization and modification by humans, has strains that are diploid (two sets of chromosomes), tetraploid (four sets of chromosomes) with the common name of durum or macaroni wheat, and hexaploid (six sets of chromosomes) with the common name of bread wheat. Many agriculturally important plants of the genus Brassica are also tetraploids.Polyploidy can be induced in plants and cell cultures by some chemicals: the best known is colchicine, which can result in chromosome doubling, though its use may have other less obvious consequences as well. Oryzalin will also double the existing chromosome content.