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A picture of someones chromosomes Centromere
Normal Karyotypes Has 46 chromosomes for humans Arranged in 23 pairs
Female Sex is determined on the 23 rd Pair. Both chromosomes are X chromosomes X
Male * Sex is determined on the 23 rd pair. *One chromosome is X and the other is a Y chromosome
Trisomy 21 – Down Syndrome Extra Chromosome on 21 Total of 47 Chromosomes
Symptoms: Flat Face Small Broad Nose Upward Slanted Eyes Moderate to Severe Retardation Some Medical Problems (Heart Defects) 90% of cases come from the mothers egg.
Down Syndrome Karyotype
Trisomy 13 – Patau Syndrome Extra Chromosome on 13 Total of 47 Chromosomes
Symptoms: Cleft lip or palate Close-set eyes -- eyes may actually fuse together into one Decreased muscle tone Extra fingers or toes Mental retardation
Patau Syndrome Karyotype
Klinefelters Syndrome (XXY) Extra Sex Chromosome X Total of 47 Chromosomes
Symptoms: Tall Stature Sometimes Lack Facial Hair More Breast Tissue than Normal Small Testes Sterile
Klinefelters Syndrome Karyotype
Turners Syndrome (X-) Missing an X chromosome on 23 rd Pair.
Symptoms: Infertile Lack Ovarian Development Short Stature Short Webbed Neck In 75-80% of cases, the fathers sperm is missing the X chromosome.
Turners Syndrome Karyotype
Androgen Insensitivity Syndrome (AIS) Genetic make-up of an XY male Develop as a Female Resistant to Androgens –the hormones responsible for male sexual development * EX: JAMIE LEE CURTIS
2 Types: Complete AIS: –1 in 20,000 births –Prevents development of Penis and other male body parts. –Look like females, have no uterus and no menstruation.
Incomplete AIS: –Both male and female characteristics –Has a vagina, but no uterus or cervix –Enlarged Clitoris –Testes in the abdomen or unusual places
XYY Syndrome Occurs on 23 rd pair, extra Y Very Tall Extra Acne during Adolescence Sometimes develop Learning Disabilities
XYY Syndrome Karyotype
Karyotypes. a picture of someones chromosomes Centromere.
Karyotypes & Genetic Disorders. Karyotypes an organized profile of a person’s homologous chromosomes (somatic cells only) Each pair is organized by size,
Nondisjunction Disorders. Down Syndrome (trisomy 21) 47, XX, +21 / 47, XY, +21 the result of an extra copy of chromosome 21 characteristic facial features,
Karyotypes. 1. What is a karyotype? a. Picture of the 23 pairs of chromosomes.
Karyotyping Notes and Activity Pages. ●Chromosomal mutations… – Additional, missing, or damaged chromosomes cause several human genetic disorders. – One.
Karyotype and Chromosomal Mutation Notes. What is a karyotype? A karyotype is a picture of chromosomes found in a typical human body cell. The karyotype.
Karyotypes Karyotype = A display (picture) of all the chromosomes in the nucleus of a cell. A display (picture) of all the chromosomes in the nucleus.
Karyotyping Notes and Activity Pages PAP Biology.
Abnormal Meiosis: Nondisjunction. Disorders Caused by Nondisjunction of Autosomal Chromosomes: There only 3 autosomal trisomies that result in a baby.
Karyotypes—Human A karyotype is a photographic inventory of an individual’s chromosomes.
Human Karyotypes Human Karyotypes. Normal Female: 46, XX.
The Human Genome Karyotype: When chromosomes are photographed, then paired to observe size and number. Human Body Cell: Has 46 chromosomes, 2 of the 46.
Chromosomal Karyotypes. Chromosomes Definition Genetic structures of cells containing DNA Identification Each chromosome has a characteristic length and.
Karyotypes. Karyotypes DefinitionDefinition - A picture of chromosomes cut out and grouped together. Typical human karyotype: –46 total chromosomes –23.
Chromosomes. Karyotype – the total chromosome constitution of an individual.
Down Syndrome (trisomy 21) result of an extra chromosome 21 1:700 children characteristic facial features, short stature; heart defects, shorter lifespan…
Nondisjunction disorders. Nondisjunction Nondisjunction—When chromosomes fail to separate during meiosis. This can happen at anaphase I or II.
MISTAKES IN MEIOSIS: GENETIC DISORDERS SBI 3C: NOVEMBER 2012.
Sex Determination & Nondisjunction Disorders June 13, 2016.
Genotype Specificity Karyotypes of Chromosomal Disorders
Human Genetic Disorders Their symptoms…. Crouzon Syndrome genetic disorder, skull bones fuse, 1- 25,000 are affected *
Chromosomal Disorders (Syndromes) ************************
Chapter 9 Cell Division. Why do cells need to divide? Grow Repair/heal Reproduce asexually Form gametes (ie – sperm and egg)
What is a Karyotype? Karyotype: picture of an individuals chromosomes arranged in homologous pairs. Chromosomes are usually extracted during METAPHASE.
Chromosomal Disorders. Non-disjunction During meiosis, chromosomes are supposed to be divided evenly and into gametes. During meiosis, chromosomes are.
Atypical Meiosis BC Science Probe 9 Section 4.5 Pages
Packaged Instructions for Life. Chromosomes are packages of DNA wrapped with proteins called histones Composed of two identical sister chromatids.
1. Chromosomes 2 Chromosome Number All cells in the human body (SOMATIC CELLS) have 46 or 23 pairs of chromosomes Called the DIPLOID or 2n number GAMETES.
Karyotypes. What is a Karyotype? A karyotype is an organized profile of a person's chromosomes. A karyotype is an organized profile of a person's chromosomes.
Numerical chromosome Aberrations Prepared By: Nouf Alyami & Eman Farhan.
Nondisjunction Homework for 11/13/14 Fill out notes on the back of page 34, which is the Cell Division Venn Diagram.
Occurs when chromosomes fail to separate during meiosis EITHER Homologues chromosomes during anaphase I OR Sister chromatids during anaphase.
Karyotypes A karyotype is a map of an individual’s chromosomes. Karyotypes are normally used if a chromosomal genetic disorder is suspected in an individual.
Karyotype Curiosities Visual Aids. Fertilization The fusion of a sperm and egg to form a zygote. The fusion of a sperm and egg to form a zygote. Once.
Chromosomes and Karyotypes. Review of Chromosomes Super coiled DNA Super coiled DNA Structure: It may be Structure: It may be –A single coiled DNA molecule.
February 23, 2009 Objective: Discuss the effects of nondisjunction Drill: What is crossing over? What phase of meiosis does it occur?
Karyotyping Chromosomes are extracted from a cell, stained, photographed and paired for genetic analysis in the lab. Karyotypes are used to identify chromosomal.
Sex Determination & Nondisjunction Disorders October 24, 2015.
Autosomal and Sex chromosome abnormalities. Sex chromosome anomalies Sex Chromosome Abnormalities Pattern / NameCharacteristicsIncidenceTreatment XYYMale;
Chromosomal Mutations & their effects. Karyotype A picture of the chromosomes of an individual or a species, including number, form, and size of the chromosomes.
Karyotypes. Karyotypes are pictures of homologous chromosomes lined up together during metaphase I of meiosis. There are 44 autosomes and 2 sex chromosomes.
KARYOTYPING AND NON-DISJUNCTION. What is karyotyping? A method of identification of chromosomes Pictures of chromosomes are taken as the cell undergoes.
Sex chromosomes Most mammals have one pair of sex chromosomes Males Females.
1 Chapter 11 Complex Inheritance and Human Heredity 11.3 Chromosomes and Human Heredity.
Chromosome Abnormalities Karyotype Charts. I single Y chromosome is a sufficient to produce maleness while its absence is necessary for femaleness……
Karyotyping and Pedigree Analysis. Normal Human Karyotype 46 Chromosomes 44 autosomes + 2 sex chromosomes 44 autosomes + 2 sex chromosomes Chromosomes.
ASSESSMENT REMINDER: If you FAIL (below 70%) an assessment, regardless of the type, you can retest (following reteach) the objective you failed for a maximum.
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