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1q21 microdeletions
1q21 microdeletions

... (array-CGH). This shows gains and losses of tiny amounts of DNA throughout the genome (also called duplications and deletions) and can show whether particular genes are present or not. A deletion so small that it can only be identified in this way is called a microdeletion. ...
1q21 microdeletions
1q21 microdeletions

... (array-CGH). This shows gains and losses of tiny amounts of DNA throughout the genome (also called duplications and deletions) and can show whether particular genes are present or not. A deletion so small that it can only be identified in this way is called a microdeletion. ...
Imposition of Crossover Interference through the
Imposition of Crossover Interference through the

... Our study provides strong evidence that synapsis initiation and crossing over occur at the same sites on chromosomes. First, and most compelling, we have found that SICs display interference, just like COs. In addition, SICs tend to be reduced in frequency near centromeres, and they are found at hig ...
Lecture Notes in Population Genetics
Lecture Notes in Population Genetics

... are located on the X-chromosome in humans. (The gene for the blue pigment is autosomal.) As expected, hemophilia and red/green color blindness are much more common in males than in females. One sex or two? In most higher animals and some plants, the population is split into two sexes and mating occu ...
Part A
Part A

... The Y Chromosome A. Region coding for testicular development • Short arm of Y chromosome –H-Y Antigen « no longer believed to be involved –SRY « Codes for a DNA binding protein « acts as a transcription factor « Causes ...
Biology Chapter 11 PRETEST
Biology Chapter 11 PRETEST

... Gregor Mendel’s principles of genetics apply to a. plants only. b. animals only. c. pea plants only. d. all organisms. A man and a woman who are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). Which of Mendel’s principles explain(s) why the offspring is albino? ...
Complex History of a Chromosomal Paralogy Region: Insights from
Complex History of a Chromosomal Paralogy Region: Insights from

... and insulin-like genes is particularly close. Chromosome 11 has tryptophan hydroxylase (TPH) and tyrosine hydroxylase (TH), while chromosome 12 has phenylalanine hydroxylase (PAH). Chromosome 11 has insulin and IGF-2, while chromosome 12 has IGF-1 (fig. 1). An amphioxus homologue of the vertebrate i ...
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chapter14_Sections 1

... • Autosomal dominant inheritance pattern • Autosomal recessive inheritance pattern • X-linked recessive inheritance pattern • X-linked dominant inheritance pattern • Changes in chromosome number • Changes in chromosome structure ...
outline4003
outline4003

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Solid Tumour Section Soft tissue tumors: an overview in Oncology and Haematology
Solid Tumour Section Soft tissue tumors: an overview in Oncology and Haematology

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The evolution of sex chromosomes in organisms with separate
The evolution of sex chromosomes in organisms with separate

... SDR. Selection acts in both the haploid and diploid phases and can be sex specific in haploids. For ease of interpretation, we refer to fitness in male haploids, female haploids, and diploid sporophytes using the letters Uk , Vk , and Skl , respectively, depending on the genotype at the selected loc ...
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File formats for NGS data - Bioinformatics Training Materials

... ■ Chicken - Gallus_gallus-5.0 (16 Dec 2015) ○ Latest human assembly is GRCh38, patches add information to the assembly without disrupting the chromosome coordinates ● Other model organisms are maintained separately, like: ○ Drosophila - Berkeley Drosophila Genome Project ...
Biology 3A Laboratory Mendelian, Human and Population Genetics
Biology 3A Laboratory Mendelian, Human and Population Genetics

... chromosome and may have several versions/forms called alleles. For example, in pea plants, height is governed by a single gene which can have two versions, T and t. Every diploid cell has two copies of one gene which make up the homologous pair of chromosomes that determine a particular trait. Thes ...
Chapter. 13(Meiosis & Sexual Life Cycles)
Chapter. 13(Meiosis & Sexual Life Cycles)

... up of segments of DNA. • Genes are passed to the next generation through reproductive cells called gametes (sperm and eggs). • Each gene has a specific location called a locus on a certain chromosome. ...
Primary sex determination in the nematode C. elegans
Primary sex determination in the nematode C. elegans

... At step one, the her-l gene appears to control a choice between male and hermaphrodite development, but at step three, the fern genes control a choice between male and female development. Both XX and XO fern mutants develop into fertile females, in which the early gametes normally destined for sperm ...
Background and Overview of Comparative Genomics
Background and Overview of Comparative Genomics

... variable class of DNA (type I markers). However, these highly polymorphic markers are of very limited use for comparisons between genomes because their variability makes it impossible to detect homology across species. Although they may be employed in linkage mapping in closely related species (for ...
Punnet squares lecture rev 1-27
Punnet squares lecture rev 1-27

... “During the formation of gametes (eggs or sperm), the two alleles responsible for a trait separate from each other. Alleles for a trait are then "recombined" at fertilization, producing the genotype for the traits of the offspring. “ (more about this on Monday) ...
Isolation and Characterization of Chromosome-Gain and Increase-in-Ploidy Mutants in Yeast.
Isolation and Characterization of Chromosome-Gain and Increase-in-Ploidy Mutants in Yeast.

... result in colony colorchanges. These assays have been used to isolate chromosomeloss mutants(HOYT,STEARNSand BOTSTEIN1990; SHEROand HIETER1991; SPENCER et a l . 1990). While these color assays are very sensitive, they only detect changes in the ratio of the copy number of the two marked chromosomes. ...
Diploid female gametes induced by colchicine in Oriental lilies
Diploid female gametes induced by colchicine in Oriental lilies

... Cytological observation of F1 hybrids produced by the induced diploid-gametes showed that triploid plants were obtained as expected and its chromosome number is 2n = 3x = 36. However, chromosome number variations were also observed among the vegetative descendants of these triploid plants and some p ...
Sex-Linked Problem Set
Sex-Linked Problem Set

... means she was either a carrier or had muscular dystrophy. The man must pass the gene to all of his daughters, so they will be carriers (or could have muscular dystrophy if their mother also carries the recessive allele). The man will not pass the gene to his sons. ...
Discussion & Naming of Complex Patterns of Inheritance
Discussion & Naming of Complex Patterns of Inheritance

... trait on a non-sex chromosome  Sex-Chromosome = X or Y, chromosome pair #23  “sex-linked” trait = trait on the X or Y [sex] chromosome ...
Letter Gene Survival and Death on the Human Y
Letter Gene Survival and Death on the Human Y

... were divided into three sets: those with 1) 17 previously identified X-linked genes with functional Y gametologs [Ross et al. 2005]), 2) 265 X-linked genes with pseudogenized Y gametologs, and 3) 315 X-linked genes whose Y gametologs have either been completely lost from the Y chromosome or have div ...
Albinism - andoverhighanatomy
Albinism - andoverhighanatomy

... x chromosome. Occurs in males. Men with this albinism have developmental and functional vision problems while the skin, hair, and eye color are all ...
HS-SCI-APB-Unit 3 -- Chapter 13- Meiosis and Sexual Life Cycles
HS-SCI-APB-Unit 3 -- Chapter 13- Meiosis and Sexual Life Cycles

... copies of each chromosome, as flies and humans do-and the progeny is going to be diploid, then you've got to make sperm and eggs that have only one copy of each chromosome, so that when those sperm and egg come together you restore the right chromosome number. And to produce sperm and eggs with only ...
A long-term demasculinization of X
A long-term demasculinization of X

... some, either relocating them to the autosomes or eliminating them from the genome entirely. We investigated the contribution of MSCI and sexual antagonism to the observed X chromosome demasculinization for incRNAs in Drosophila. It is not trivial to separate the effects of sexual antagonism and MSCI ...
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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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