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Prophase II
Prophase II

... reproduction that contribute to variety: •Crossing-over •Independent assortment •Random fertilization ...
Name
Name

... 4. How does a person with one sickle-cell allele differ from a person with two sickle-cell alleles? 5. Why is hemophilia more common in males than in females? 6. Explain what causes Down syndrome. ...
Meiosis - My Haiku
Meiosis - My Haiku

... without variation. Why change what works? Genetically different offspring may be more successful. ...
Chapter 2 - FacultyWeb Support Center
Chapter 2 - FacultyWeb Support Center

... • Approx. 30,000 Americans have disorder, 10 million more are carriers (1 in 31 people) • Caused by recessive gene • Most common fatal hereditary disease among Caucasians • Children suffer from excessive production of thick mucus that clogs the pancreas and lungs • Most victims die of respiratory in ...
File - fiserscience.com
File - fiserscience.com

... exhibit unique patterns of inheritance due to the presence of only one X chromosome in males and two in females • Males cannot be either homozygous or heterozygous for X linked genes – they have only one copy of a gene in a diploid cell - hemizygous ...
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... AUGUST 2009 36. Which are alternate forms of genes? (A) alleles (B) chromatids (C) hybrids (D) sub units 37. How did Mendel obtain the F1 generation of all hybrid tall pea plants? (A) hybrid tall Xhybrid tall (B) hybrid tall Xpure tall (C) pure short Xpure short (D) pure tall Xpure short 38. E ...
Medelian Inheritance
Medelian Inheritance

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DNA - NIU Department of Biological Sciences
DNA - NIU Department of Biological Sciences

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Ch 14 - Narragansett Pier School
Ch 14 - Narragansett Pier School

... crossed with a red eyed female (♀)→ in F2 only males had white eyes ? → eye color and sex are linked  Linked genes = when genes are on the same chromosome, so they are inherited together ...
Meiosis Homework Questions
Meiosis Homework Questions

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Chapter 14 Power Point File
Chapter 14 Power Point File

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length of exons and introns in genes of some human chromosomes
length of exons and introns in genes of some human chromosomes

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(NBIA24, 91BI11, 91BI17, 92BI11, 92BI17 och TFBI11), 22/3
(NBIA24, 91BI11, 91BI17, 92BI11, 92BI17 och TFBI11), 22/3

... genotypes A1 A1 , A1 A2 and A2 A2 , if A2 is the allele with the 660 kb deletion? (a) 1 - s, 1, 0 (b) 1, 1, 0 (c) 1, 1 - s, 1 - s (d) 1 - s, 0, 1 (e) 1 - s, 1, 1 - s 16. Which is the term used to describe the type of selection acting in question 15? (a) Positive selection (b) Negative selection (c) ...
Heredity and Genetics Study Guide
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Evolution Acts on the Phenotype
Evolution Acts on the Phenotype

... For example, Tay-Sachs disease is a recessive human genetic disorder. That means only individuals with the homozygous recessive genotype, rr will be affected. Affected individuals usually die from complications of the disease in early childhood, at an age too young to reproduce. The two parents are ...
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... lipase (LPL) deficiency may result from a primary 8q24 region, where the MYC gene resides.'20 The defect in the LIPD gene itself or from a defect in the major or common rearrangement, t(8;14)(q24;q32), APOC2 gene (on chromosome 19)107 which produces involves a translocation of the MYC locus to the a ...
Leukaemia Section t(9;11)(p22;q23) Atlas of Genetics and Cytogenetics in Oncology and Haematology
Leukaemia Section t(9;11)(p22;q23) Atlas of Genetics and Cytogenetics in Oncology and Haematology

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... Background: The origin of eukaryote-specific traits such as mitosis and sexual reproduction remains disputable. There is growing evidence that both mitosis and eukaryotic sex (i.e., the alternation of syngamy and meiosis) may have already existed in the basal eukaryotes. The mating system of the hal ...
meiosis
meiosis

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What is the genomic location for the rice blast resistance gene Pi-ta
What is the genomic location for the rice blast resistance gene Pi-ta

... Answer: The nearest marker to Pi-ta is C53024S. Note that there are two sequence accessions that have been associated with the marker. This is because RFLP clones generally have both forward and reverse sequence. (Occasionally there are additional sequences associated with a given marker.) You can a ...
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Fundamentals of Genetics

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Tutorial_9_NEW

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Study Guide
Study Guide

... offspring will have an incorrect chromosome number = aneuploidy.  Fertilized eggs that have received three copies of the chromosome in question are said to be trisomic; those that have received just one copy of a chromosome are said to be monosomic for the chromosome.  Fig 15.12 shows non-disjunct ...
Meiosis and Sexual Life Cycles by Dr. Ty C.M. Hoffman
Meiosis and Sexual Life Cycles by Dr. Ty C.M. Hoffman

... a  karyotype.  Each  species  has  a  characteristic  number  of  different  chromosomes,  which  are  different   from  each  other,  because  they  carry  genes  for  different  characteristics.  Ploidy  refers  to  the  number  of   sets ...
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X-inactivation



X-inactivation (also called lyonization) is a process by which one of the two copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by its being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. As nearly all female mammals have two X chromosomes, X-inactivation prevents them from having twice as many X chromosome gene products as males, who only possess a single copy of the X chromosome (see dosage compensation). The choice of which X chromosome will be inactivated is random in placental mammals such as humans, but once an X chromosome is inactivated it will remain inactive throughout the lifetime of the cell and its descendants in the organism. Unlike the random X-inactivation in placental mammals, inactivation in marsupials applies exclusively to the paternally derived X chromosome.
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