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The phases of meiosis II
The phases of meiosis II

... • In the body cells of animals and most plants, chromosomes occur in pairs – there are 2 of each. • A cell with two of each kind of chromosome is called a diploid cell and contains a, 2n, number of chromosomes. You will find these cells in most of the body. ...
Ch 11 RNO
Ch 11 RNO

... 1. Describe the relationship between genes and chromosomes. 2. Describe homologous chromosomes. 3. Explain what a diploid cell is. a. What symbol is used to represent chromosomes in a diploid cell? b. What does N stand for? 4. What are haploid cells? 5. What is meiosis? 6. What are the two divisions ...
PSYC 2314 Chapter 3
PSYC 2314 Chapter 3

... Development Begins • Conception occurs when the male gamete (sperm) penetrates the membrane of the female gamete (the ovum); the gametes then fuse, and their genetic material combines, to form the one-celled zygote. • Within hours, the zygote initiates the human development through the processes of ...
Ch 15 slideshow
Ch 15 slideshow

... 1. Patterns of inheritance of many traits do not follow ratios predicted by Mendel’s Laws and can be identified by quantitative analysis, where observed phenotypic ratios statistically differ from the predicted ratios. ...
Heredity Power Point - Auburn School District
Heredity Power Point - Auburn School District

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Theoretical genetics
Theoretical genetics

...  Certain colors cannot be distinguished, and is most commonly due to an inherited condition. Red/Green color blindness is by far the most common form, about 99%, and causes problems in distinguishing reds and greens. Another color deficiency Blue/Yellow also exists, but is rare and there is no comm ...
File - Varsity Field
File - Varsity Field

... of nonhomologous chromosomes. The first chromosome is colored orange and the second blue for tracking. Sister and nonsister chromatids are marked, as are the alleles for the first gene (a or A) and the second gene (b or B). Also indicated are the two random possibilities for relative orientation of ...
Vocab For Genetics - VCC Library
Vocab For Genetics - VCC Library

... As a verb, short for cross-breed: to mate two organisms with different traits, whether experimentally, or to create some advantageous result in the offspring. As a noun, an instance of cross-breeding. ...
Patterns of Inheritence - School District of La Crosse
Patterns of Inheritence - School District of La Crosse

... Two factors called genes control each trait For each gene, organisms receive one allele (form) from each parent randomly. If an organism receives different alleles for the same trait, one allele is dominant over the other ...
Chapter 13 - Warren County Schools
Chapter 13 - Warren County Schools

... New offspring arise by MITOSIS & are virtually exact copies of the parent’s genome Offspring is called a clone (genetically identical) ...
Document
Document

... Use the terms from the following list to complete the sentences below. Each term maybe used only once. Some terms may not be used. ...
Inheritance - Thornapple Kellogg High School
Inheritance - Thornapple Kellogg High School

... What others can you think of? ...
Chromosomal Mapping of Murine c-fes and c
Chromosomal Mapping of Murine c-fes and c

... the other is ascertained, resulting in a strain distribution pattern (SDP) for a given genetic locus (see Table 1). (iii) The newly determined SDP is compared with SDPs of previously mapped genes to ascertain the degree of linkage and, thus, the chromosomal position of the particular gene (8, 30). P ...
Constructing A Human Lab
Constructing A Human Lab

... 24. What determines the traits your baby has?_______________________ 25. What determines traits in real life?______________________________ 26. Is this lab an example of asexual reproduction or sexual reproduction?________________ ...
Chapter 15 The Chromosomal Basis of Inheritance
Chapter 15 The Chromosomal Basis of Inheritance

... Around 1900, cytologists and geneticists began to see parallels between the behavior of chromosomes and the behavior of Mendel’s factors. ° Using improved microscopy techniques, cytologists worked out the process of mitosis in 1875 and meiosis in the 1890s. ° Chromosomes and genes are both present i ...
cell division notes -
cell division notes -

... Turner's syndrome (45, X0) (learn more about the disorder) Klinefelters syndrome (47, XXY) Down's syndrome (trisomy 21) (learn more about the disorder) - p. 145 other abnormalities related to XY and gender: Animations on sex determination | Gender testing of female athletes | sex unknown: NOVA websi ...
Non Mendelian Genetics
Non Mendelian Genetics

... chromosomes) are considered to be sex-linked traits. Alleles on the X chromosome do not have a corresponding allele on the Y chromosome. Thus, females, having two X chromosomes, have two alleles for the trait. Males, having an X and a Y chromosome, have only one allele for the trait. Redgreen color- ...
GENETICS A
GENETICS A

... equally likely ways They assort independently Fertilization 9:3:3:1 ratio ...
document
document

... Genes on the Y are NOT sex-linked; they are called “holandric” instead. • Because males (mammals, that is) have only 1 X, any gene on the X in a male is expressed, whether dominant or recessive. In contrast, females have 2 X’s, so recessive traits are often covered up by the dominant normal (wild ty ...
PowerPoint
PowerPoint

... chromosomes (XX) while a male zygote will have one X and one Y chromosome (XY). ...
Name
Name

... In animals and in some plants, one pair of chromosomes is different in the two sexes. For example, in humans there are 22 similar pairs of chromosomes (autosomes) and the 23rd pair may be different (sex chromosomes). The sex chromosomes are similar in females and both are referred to as the "X" chro ...
Chapter 15 – The Chromosomal Basis of Inheritance
Chapter 15 – The Chromosomal Basis of Inheritance

... One of Morgan’s students, Alfred Sturtevant, used crossing over of linked genes to develop a method for constructing a genetic map, an ordered list of the genetic loci along a particular chromosome. ...
3.2 Chromosomes - Peoria Public Schools
3.2 Chromosomes - Peoria Public Schools

... https://en.wikipedia.org/wiki/File:PBR322_plasmid_showing_restriction_sites_and_resistance_genes.jpg ...
Single Gene Inheritance
Single Gene Inheritance

... heterozygote females. • Genetic interactions between different genes. • Trait is inherited on genetic material from only one parent. e.g. mitochondrial DNA is only inherited from the ...
αρχες ιατρικης γενετικης - e
αρχες ιατρικης γενετικης - e

... repeats increases each time the mutation is passed through another female. Also, only 5% of the NTM's sisters are affected, and only 9% of his brothers are affected, but 40% of his grandsons and ...
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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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