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Drosophila-Mega-Review
Drosophila-Mega-Review

... o Chromosome I is the sex chromosome  Females: XX  Males: XY (XO is sterile male)  No meiotic recombination in males (doesn’t matter which chromosome)  Y has few genes (heterochromatic) so generally, if you put a transgene on the 1st chromosome it would be on the X chromosome o Chromosomes II, I ...
A genome-wide association study of chronic otitis media with
A genome-wide association study of chronic otitis media with

... Objectives: Chronic otitis media with effusion (COME) and recurrent otitis media (ROM) have been shown to be heritable, but candidate gene and linkage studies to date have been equivocal. Our aim was to identify genetic susceptibility factors using a genome-wide association study (GWAS). Methods: We ...
Meiosis
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Period 5 1. In Trisomy X Syndrome, what is the abnormality? a. An
Period 5 1. In Trisomy X Syndrome, what is the abnormality? a. An

... 12. What is Haploid cell a. One chromosome from mom and one chromosome from dad in one cell b. Gemetes created through meiosis c. One of the sister cells d. One of the four unique cells made from meiosis 13. Which best describes the purpose of mitosis? a. To repair the Organism and develop the body. ...
10.1 Meiosis Notes - Twanow
10.1 Meiosis Notes - Twanow

... (fertilized egg) Haploid – a cell with a single chromosome set – symbolized as n  In humans, haploid cells have one set of 23 chromosomes  Examples: gametes (egg and sperm cells formed by meiosis) ...
10.2: Dihybrid Crosses
10.2: Dihybrid Crosses

... chromosomes that carry genetic instruction and any chromosome other than a sex chromosome; come in pairs. Sex chromosomes- Come in pairs also, but there are two types, X & Y. For humans, the Y chromosome is the “determining factor” as it determines whether or not the embryo is male or female. ...
Unit 4 review questions
Unit 4 review questions

... 6. Explain how one allele can be dominant over another at the molecular level. 7. How is a pedigree used in genetics? 8. Distinguish between recessively and dominantly inherited disorders? 9. What is chorionic villus sampling? 10. What is meant by the term linked genes? 11. Looking at progeny, how m ...
The process of meiosis - Deans Community High School
The process of meiosis - Deans Community High School

... The process of meiosis Using the diagram of meiosis on pp80-81 Torrance or meiosis handout, read through p 82 Torrance and carefully consider what is happening throughout the process of meiosis. You may wish to make notes but the important thing is that you understand what is going on and have a men ...
BIOLOGY STANDARD 4
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... Autosome - any chromosome other than the sex chromosome Carrier - an individual who is heterozygous for a recessive trait, and therefore will not express the trait, but may pass the trait on to its offspring. (Example is carrier of Sickle Cell anemia) Chromosomes - long coiled strands of deoxyribonu ...
No Slide Title
No Slide Title

... XXX Condition (Poly X females) • The presence of three X chromosomes along with a normal set of autosomes (47,XXX) results in female differentiation • Frequently, 47,XXX women have no distinctive features other than a tendency to be tall and thin. • 1 in 1000 female births • Although a few are ster ...
linked genes
linked genes

... inherited all linked together as a package deal on the same chromosome? (But hey, that would be a contradiction of Mendel’s law of Independent Assortment, would it not?!) As a matter of fact – some genes are linked in this manner. William Bateson was the famous scientist who “rediscovered” Mendel, w ...
Gene Section AF4 (ALL1 fused gene from chromosome 4)
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... Typically CD19+ B-ALL, biphenotypic AL, at times ANLL (M4/M5); may be congenital; treatment related leukaemia (secondary to epipodophyllotoxins). Prognosis Median survival < 1 yr. Cytogenetics Additional chromosome anomalies are found in ¼ of cases of which is the i(7q). Hybrid/Mutated Gene 5’ MLL - ...
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... 6. Mode of inheritance refers to whether a trait is dominant or recessive, autosomal or carried on a sex chromosome. 7. An autosomal condition is equally likely to affect either sex. 8. X-linked characteristics affect males much more than females. 9. Recessive conditions can skip a generation becaus ...
Chromosome Mutation - Hicksville Public Schools
Chromosome Mutation - Hicksville Public Schools

... 1. Achondroplasia - most common genetic cause of dwarfism 2. Albinism - little or no production of melanin in hair, skin, and iris of the eyes 3. Bloom Syndrome - high frequency of breaks and rearrangements in the chromosomes 4. Cystic Fibrosis - autosomal recessive disorder secreting mucus and swe ...
Day 4. Genes and Genetic Level of Organization
Day 4. Genes and Genetic Level of Organization

... List the levels of organization from the most basic unit of life to the most complex learned so far. _____, __________, _________, _________________, ________________. Traits that can change because of your environment are known as ______________ traits. Traits that are passed down from generation t ...
Higher Human Biology Chapter 9 Questions
Higher Human Biology Chapter 9 Questions

... What name is given to the process by which the nucleus of a normal body cell divides into 2 new daughter nuclei followed by the division of the cytoplasm to form two new daughter cells? ...
File
File

... _____ 17. When Mendel crossed true-breeding tall pea plants with true-breeding short pea plants, all the offspring were tall because a. the allele for tall plants is recessive. b. the allele for short plants is dominant. c. the allele for tall plants is dominant. d. they were true-breeding like thei ...
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aren`t completely dominant

... In males, EVERY gene on their X chromosome is expressed. The Y doesn’t have the same genes. In females this is not the case because they have another copy on their other X chromosome to overcome it. ...
Snímek 1
Snímek 1

...  58 million bp (0.38% of the total DNA in a human cell)  86 genes, which code for 23 proteins  in mammals, gene SRY (Sex-determining Region on Y, for testis development, thus determining sex) and other genes for production of sperma ...
Inheritance and Genetic Diseases
Inheritance and Genetic Diseases

... Female chromosome(X) never swops info with male chromosome (Y) o Therefore info pertaining to sex including traits of that sex is inherited by offspring as a complete set of info Y dominant over X, therefore all males carry XY all females carry XX This means father determines sex as mother donates X ...
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3.2.U1 Prokaryotes have one chromosome consisting of a

... Eukaryotic chromosomes are linear chromosomes that vary in length, in position of the centromere that holds the sister chromatids together, and by the genes that it contains. In humans there are 23 types of chromosomes. There are 22 pairs of autosomes. The 23rd pair are the sex chromosomes. Males ha ...
HRW BIO CRF Ch 06_p01-58
HRW BIO CRF Ch 06_p01-58

... ______ 5. The two exact copies of DNA that make up each chromosome are called a. homologous chromosomes. c. chromatids. b. centromeres. d. autosomes. ______ 6. The two chromatids of a chromosome are attached at a point called the a. diploid. c. spindle. b. centriole. d. centromere. ______ 7. Chromos ...
Lecture#18 - Chromosome Rearrangements
Lecture#18 - Chromosome Rearrangements

... deletions, duplications, inversions, and/or translocations of DNA segments. 2. Rearranged chromosomes may pair improperly at meiosis and alter the distribution of chromosomes thereby affecting fertility. 3. Rearrangements can break genes and produce unbalanced gametes (and therefore unbalanced proge ...
Gregor Mendel - BHMS
Gregor Mendel - BHMS

...  Only 1 _____________ cell is needed  Parent divides by ________________  Daughter cells are __________ __________ copies of parent cell  Most cells in ___________________ and most single celled organisms reproduce this way Sexual Reproduction ...
Congenital_and_Hereditary_Diseases_9
Congenital_and_Hereditary_Diseases_9

... physical, biochemical, and physiologic traits from biological parents to their children • Disorders can be transmitted by gene mutations that can result in disability or death • Genetic information is carried in genes strung together on strands of DNA to form chromosomes • Except reproductive cells, ...
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Y chromosome



The Y chromosome is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development. The DNA in the human Y chromosome is composed of about 59 million base pairs. The Y chromosome is passed only from father to son. With a 30% difference between humans and chimpanzees, the Y chromosome is one of the fastest evolving parts of the human genome. To date, over 200 Y-linked genes have been identified. All Y-linked genes are expressed and (apart from duplicated genes) hemizygous (present on only one chromosome) except in the cases of aneuploidy such as XYY syndrome or XXYY syndrome. (See Y linkage.)
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