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Comprehension Questions
Comprehension Questions

... Recombination means that meiosis generates gametes with different allelic combinations than the original gametes the organism inherited. If the organism was created by the fusion of an egg bearing AB and a sperm bearing ab, recombination generates gametes that are Ab and aB. Recombination may be cau ...
Temporal genomic evolution of bird sex chromosomes
Temporal genomic evolution of bird sex chromosomes

... and Z chromosomes. We focus all our analyses throughout this study between these two sets of chromosomes of a similar size, because microchromosomes have very different genomic features (i.e., recombination rate, gene density, GC content, repeat content etc.) compared to others [50], which influence ...
Genetic Review 2007 - Wayne State University
Genetic Review 2007 - Wayne State University

...  Mitosis: S phase of interphase for somatic cells  Meiosis: Once a diploid cell differentiates to the germ line, there is one duplication in S phase of interphase (46x2=92) & two divisions (92/2=46; 46/2=23), forming a haploid gamete. 3) Describe how meiosis facilitates the three major features of ...
The X Chromosome in Quantitative Trait Locus Mapping
The X Chromosome in Quantitative Trait Locus Mapping

... methods and computer programs have been developed to map QTL. Virtually all of this work has focused exclusively on autosomal loci. However, the X chromosome displays special behavior and must be treated differently in QTL mapping. Often crosses are set up to avoid recombination on the X chromosome. ...
Meiosis II
Meiosis II

... starts with one cell containing 46 chromosomes (23 pairs) and results in four cells containing 23 chromosomes.  The copies of DNA are separated when gametes are formed. ...
11.1 Mendel and the Garden Pea 11.1 Mendel and the
11.1 Mendel and the Garden Pea 11.1 Mendel and the

... such as cystic fibrosis and sickle - cell anemia Figure 11.13 Pleiotropic effects of the cystic fibrosis gene 11.6 Why Some Traits Don’t Show Mendelian Inheritance ...
SEX-LINKED INHERITANCE
SEX-LINKED INHERITANCE

... clots to important organs, anemia and usually dies prematurely. ...
Pedigree Analysis in Human Genetics
Pedigree Analysis in Human Genetics

... • Genetic traits are described, cataloged, and numbered in a database called Online Mendelian Inheritance in Man • OMIM is updated daily and contains information about all known human genetic traits • Each trait is assigned an OMIM number • There are more that 10,000 entries • **Chapter 4 Web Assign ...
Biology Chapter 11 (Intro to Genetics)
Biology Chapter 11 (Intro to Genetics)

... Mendel studied seven of these traits After Mendel ensured that his truebreeding generation was pure, he then crossed plants showing contrasting traits. He called the offspring the F1 generation or first filial. ...
Linkage and Recombination
Linkage and Recombination

... Note that the genes are linked; if they weren't, we would have 8 phenotypes and 8 gamete genotypes in approximately equal numbers. Arranged in pairs of equal numbers, in order of magnitude. Which are parental genotypes? Which are double crossover genotypes? ...
Practice Exam
Practice Exam

... 10. (6) Drosophila eyes are normally red. Several purple-eyed strains have been isolated as spontaneous mutants, and the purple phenotype has been shown to be inherited as a Mendelian autosomal recessive in each case. To investigate allelism between these different purple mutations, a __complementat ...
GENETICS QUIZZZZZ
GENETICS QUIZZZZZ

... PROBABILITY IS USED TO MAKE PREDICTIONS ABOUT WHAT WILL HAPPEN WHEN TRAITS GET PASSED ON. 25. LIST THE DISEASES/DISORDERS THAT SCIENTISTS WERE STUDYING IN DOGS, IN HOPES TO HELP PEOPLE WHO HAVE THOSE DISEASES/DISORDERS. FOR WHICH DISEASE DID THEY FIND THE GENE THAT CAUSES IT? ...
Article Old but Not (So) Degenerated—Slow
Article Old but Not (So) Degenerated—Slow

... evolutionary processes, although the rate of sex chromosome differentiation has been atypically low. Lack of dosage compensation may be a factor hindering sex chromosome evolution in this lineage. Key words: Z chromosome, W chromosome, evolutionary strata, gametologs, nonrecombining chromosome, bias ...
learning objectives
learning objectives

... pleiotropy (p. 194) When an allele affects more than one trait, it is said to be pleiotropic. incomplete dominance (p. 195) epistasis (p. 196) Epistasis occurs because each gene blocks the expression of the other. codominant (p. 198) Human blood groups are an excellent example of codominance. X chro ...
Biology 1406 Exam 4 Notes Cell Division and
Biology 1406 Exam 4 Notes Cell Division and

... - based on breeding garden peas, following 7 true-breeding traits through several generations - used well designed breeding experiments, large samples and mathematical techniques - determined basic patterns of inheritance These experiments led Mendel to several ideas: - for each trait there are 2 fa ...
SNP Discovery by sequencing 1000 genomes
SNP Discovery by sequencing 1000 genomes

... Two men born in the US - thousands of miles apart - have a propensity to absorb iron so well that it can cause organ damage - a condition known as hereditary hemochromatosis. The error in their genes originated in a single European ancestor, whose ancestors now number nearly 22 million including the ...
Slide 1
Slide 1

... Let’s review mitosis = a form of nuclear division, whereby the chromosome number and genetic content in the organism remains the same in both parent and daughter cells. Meiosis = A form of nuclear division that results in the reduction of chromosome number by half (from diploid cell to a haploid ce ...
A ninth locus (RP18) for autosomal dominant retinitis pigmentosa
A ninth locus (RP18) for autosomal dominant retinitis pigmentosa

... Both genes have been mapped to 1p13 by in situ hybridization (11) with human cDNA probes. However, no data were available on the position of these two genes on the genetic map of chromosome 1. Therefore, and using the genomic sequence published earlier, we have designed oligonucleotide primers for P ...
Chapter 5 - TeacherWeb
Chapter 5 - TeacherWeb

... Therefore all genotypes from true breeding organisms are represented by 2 similar alleles –represented by similar letters (pp or PP, rr or RR, etc.) The cross between 2 true breeding plants one purple flowered and one white flowered would be (where purple is dominant and white is recessive): ...
Drosophila melanogaster
Drosophila melanogaster

... interested in what we would today call classical genetics. By doing controlled crosses with different mutants, they were able to show that certain groups of genes were linked together. The number of linkage maps produced tied in with the number of chromosomes, helping to identify chromosomes as carr ...
Lesson Plans Teacher: Robinson Dates: 2/6
Lesson Plans Teacher: Robinson Dates: 2/6

... Review the required sex-linked traits that may be seen on the state test and summarize each. What is the difference between codominance and incomplete dominance ...
Chapter 13 Meiosis - Trimble County Schools
Chapter 13 Meiosis - Trimble County Schools

... parents by inheriting chromosomes • In a literal sense, children do not inherit particular physical traits from their parents • It is genes that are actually inherited ...
homework - terms: chapter 11
homework - terms: chapter 11

... 14. Describe human genetic disorders that are caused by the inheritance of recessive alleles. 15. Describe human genetic disorders that are caused by the inheritance of single dominate allele. 16. Describe and interpret a pedigree chart. 17. Distinguish between incompletely dominate and codominant a ...
Author comments - Springer Static Content Server
Author comments - Springer Static Content Server

... mutations in the adiponectin gene were not responsible for the linkage observed on chromosome 3q27 and concluded that another gene could be responsible for modulating the adiponectin levels. On the other hand Pollin TI et coll identified variations that explained the linkage result. As we report on ...
Foundations of Biology - Geoscience Research Institute
Foundations of Biology - Geoscience Research Institute

... 3n Zygote ©2000 Timothy G. Standish ...
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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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