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Project II. Meiotic Chromosomal Anomalies
Project II. Meiotic Chromosomal Anomalies

... Meiosis is a “reduction division” which , in animals, results in the formation of gametes or sex cells. During metaphase of meiosis I homologous chromosomes pair up in close proximity, a process known as synapsis. Synapsis allows for the exchange of sections of homologous chromosomes, a process know ...
Chapter 8 - Heredity
Chapter 8 - Heredity

... • 1) _____________ -is the process of passing traits from parents to offspring. • 2) The genetic makeup or genes of an organism is called its _________________. • 3) _________ determines the inherited traits of an organism. • 4) ______________ - is the way an organism looks and behaves –“expressed o ...
Structural changes following the reversal of a Y chromosome to an
Structural changes following the reversal of a Y chromosome to an

... Robertsonian translocations resulting in fusions between sex chromosomes and autosomes shape karyotype evolution in animals by creating new sex chromosomes from autosomes. These translocations can also reverse sex chromosomes back into autosomes, which is especially intriguing given that autosomes a ...
Microarray-based comparative genomic hybridisation (array CGH)
Microarray-based comparative genomic hybridisation (array CGH)

... (where a section of a chromosome is inverted or reversed), will not be identified using array CGH. This is because balanced chromosome rearrangements do not result in any loss or gain of chromosome material. It will also not detect some types of polyploidy (more than the usual 2 sets of chromosomes) ...
Chapter 6 Meiosis and Mendel
Chapter 6 Meiosis and Mendel

...  Traits produced by two or more genes are called Polygenic Traits. Ex: Human skin color and eye color are polygenic. ...
• Autosomal dominant • autosomal recessive • X
• Autosomal dominant • autosomal recessive • X

... a diagnosis. For example, a child could come to the attention of a doctor having a fracture after a seemingly trivial injury. A family history of relatives with a similar tendency to fracture and blue sclerae would suggest the diagnosis of osteogenesis imperfecta. In the absence of a positive A fami ...
Meiosis: Questions
Meiosis: Questions

... II. During this phase, centrosomes replicate but chromosomes do not. ...
Sex Chromosomal Transposable Element Accumulation
Sex Chromosomal Transposable Element Accumulation

... which is approximated by the consensus of that subfamily. Since different master genes were active at different times during primate evolution, each Alu class is of a different age (Deininger et al. 1992). The oldest class is AluJ (about 80 Myr), whereas AluS is of intermediate age, and AluY is the ...
Genetics advances and learning disability
Genetics advances and learning disability

... of disorders associated with learning disability, adding important new concepts such as dynamic mutations, imprinting and uniparental disomy to human genetics in general (the meaning of these terms will be explained below). The fact that there are more men than women with learning disability has bee ...
Practice the genetic problems!!! Gamete formation was in the last lab
Practice the genetic problems!!! Gamete formation was in the last lab

... So that is the basics. But there are sex linked traits. So there isn’t a whole lot of info on the y chromosome; sorry guys! Since the sex of an individual will matter for sex linked crosses, always write X with a superscript of the gene, X+ as an example. There are also lethal alleles, usually rece ...
A-13-LinkageAnalysis
A-13-LinkageAnalysis

... Gene Hunting: find genes responsible for a given disease Main idea: If a disease is statistically linked with a marker on a chromosome, then tentatively infer that a gene causing the disease is located near that marker. ...
(Students with questions should see the appropriate Professor)
(Students with questions should see the appropriate Professor)

... chromosomes can be identified in interphase cells obtained from normal human cells. 2) In human, only the trisomy of either human chromosome 13, 18 and 21 can produce viable individuals. 3) Endomitosis has never been detected in human cells. 4) If non-disjunction of chromosomes 18 occurs during the ...
(Students with questions should see the appropriate Professor)
(Students with questions should see the appropriate Professor)

... chromosomes can be identified in interphase cells obtained from normal human cells. 2) In human, only the trisomy of either human chromosome 13, 18 and 21 can produce viable individuals. 3) Endomitosis has never been detected in human cells. 4) If non-disjunction of chromosomes 18 occurs during the ...
Exam 3 Multiple Choice Practice Questions
Exam 3 Multiple Choice Practice Questions

... 1. Which of the following describes an organism’s relative fitness? a) survival b) number of matings c) adaptation to the environment d) successful competition of resources e) relative number of visible offspring 2. According to the Hardy-Weinberg principle, a) the allele frequencies of a population ...
Health and Technology
Health and Technology

... If there is gene linkage there is a lower probability that the alleles will be separated during meiosis. This means that more of the parental genotypes appear in the F2 generation. Different linked genes are inherited as a group rather than as separate units. The closer 2 genes are on a chromosome, ...
Genetics Exam 3_key
Genetics Exam 3_key

... B. What cross would resolve the two possible maps and what are the possible outcomes of that cross? (1) A two-point testcross to map the distance between am and nn. If the first map is correct the distance would be 39 mu and if the second map is correct the distance would be 7 mu You could also do a ...
Dihybrid Crosses - Mercer Island School District
Dihybrid Crosses - Mercer Island School District

... with a double recessive. ...
Baby Genome_make_a_baby_simulation_booklet
Baby Genome_make_a_baby_simulation_booklet

... Congratulations, you are going to simulate creating a baby! After this simulation, you should be able to answer the following questions:  How many chromosome pairs does each human parent have?  How many chromosomes does each parent "donate" to the next generation?  Are some genes and gene charact ...
Genotype to Phenotype
Genotype to Phenotype

...  How many chromosome pairs does each human parent have?  How many chromosomes does each parent "donate" to the next generation?  Are some genes and gene characteristics expressed over others.... are dominant and recessive genes responsible for how a baby looks?  What is the difference between Ge ...
Sex Determination and Sex-Linked Traits
Sex Determination and Sex-Linked Traits

... **8. A colorblind female and a male with normal color vision have three sons and six daughters. All of the sons are colorblind. Five of the daughters have normal color vision, but one of them is colorblind. The colorblind daughter is 16 years old, is short for her age, and has never undergone pubert ...
View PDF - CiteSeerX
View PDF - CiteSeerX

... As mentioned before, we model dominant-recessive heredity with one chromosome by assigning one node to have two sub-trees corresponding to alleles. As shown in gure 4, a chromosome has a tree-structure of nodes each of which has a rule-number of a rewriting rule. In gure 4, two sub-trees are delin ...
Mutations I: Changes in Chromosome Number and Structure
Mutations I: Changes in Chromosome Number and Structure

... - this duplication allows for divergence of copied gene function and evolutionary innovation. Eventually, the copies may be so different that they don’t really represent duplicates any more… resulting in “diploidization”. ...
2/25/02 Lecture Highlights: Inheritance
2/25/02 Lecture Highlights: Inheritance

... allele – different forms of a gene chromosome – tightly wound up DNA that contains many loci (and therefore many genes) homologous chromosomes – pairs of chromosomes that contain the same genes (inherit one from mom and one from dad) diploid – 2 copies of chromosomes (and hence the genes on them) ho ...
CP Biology
CP Biology

... To better understand "What makes you unique?", you will assume the role of mother or father and contribute one set of chromosomes to your "offspring." Your partner will contribute a second set of chromosomes to your "offspring." In this way, you will simulate the events that contributed to the forma ...
Chapter 15 final
Chapter 15 final

... because all daughters of affected males will be affected (the heterozygous condition is not a carrier). ...
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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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