Lecture 14 - The Chromosomal Basis of Inheritance
... • Autosomes vs. sex chromosomes • Only the ends of the Y chromosome have regions that are homologous with corresponding regions of the X chromosome • Each ovum contains an X chromosome, while a sperm may contain either an X or a Y chromosome • The SRY gene on the Y chromosome codes for a protein tha ...
... • Autosomes vs. sex chromosomes • Only the ends of the Y chromosome have regions that are homologous with corresponding regions of the X chromosome • Each ovum contains an X chromosome, while a sperm may contain either an X or a Y chromosome • The SRY gene on the Y chromosome codes for a protein tha ...
Click Here For Worksheet
... 1. What percent of your genes are found in your nucleus?__________________________________________ 2. How many genes does a human cell have?___________________________________ 3. Which is not a base that makes up DNA? (Circle One) A. Adenine ...
... 1. What percent of your genes are found in your nucleus?__________________________________________ 2. How many genes does a human cell have?___________________________________ 3. Which is not a base that makes up DNA? (Circle One) A. Adenine ...
Human Genetics: Bug Karyotype Ch. 14
... enlarged, the chromosomes are cut from the picture, and they are arranged according to size, arm length, centromere position, and banding patterns. The karyotype that results from this procedure may be used to diagnose some genetic diseases. This investigation uses karyotypes for a species of insect ...
... enlarged, the chromosomes are cut from the picture, and they are arranged according to size, arm length, centromere position, and banding patterns. The karyotype that results from this procedure may be used to diagnose some genetic diseases. This investigation uses karyotypes for a species of insect ...
Genetics
... The DNA in every cell is located in rod like segments called chromosomes Chromosomes occurs in pairs in every cell of our body except in the sperm and ovum. Chromosomes numbers are the same for each specie. ...
... The DNA in every cell is located in rod like segments called chromosomes Chromosomes occurs in pairs in every cell of our body except in the sperm and ovum. Chromosomes numbers are the same for each specie. ...
File
... Sex Chromosomes Abnormalities Human development more tolerant of wrong numbers in sex chromosome ...
... Sex Chromosomes Abnormalities Human development more tolerant of wrong numbers in sex chromosome ...
BBHH BBHh
... Beneficial mutations – allows organism to better survive: provides genetic variation ...
... Beneficial mutations – allows organism to better survive: provides genetic variation ...
Wide-spread polyploidizations during plant evolution Dicot
... intervening CDEI I regions are always highly AT -rich (76–98%). T he length of CDEI I varies twofold among species, but there is remarkably little CDEI I length variation within each species, ...
... intervening CDEI I regions are always highly AT -rich (76–98%). T he length of CDEI I varies twofold among species, but there is remarkably little CDEI I length variation within each species, ...
10.1 MEIOSIS
... ▫ Two chromosomes in each pair of a diploid cell ▫ Each pair has genes for the same trait Genes arranged in the same order, but may be different in their alleles (dominant or recessive) ...
... ▫ Two chromosomes in each pair of a diploid cell ▫ Each pair has genes for the same trait Genes arranged in the same order, but may be different in their alleles (dominant or recessive) ...
dihybrid cross: a genetic cross which examines the transmission of
... There are two types of mutation – chromosome mutation (e.g. Down’s syndrome) and gene mutation (e.g. Sickle cell anaemia). phenotype: physical appearance of an individual as a result of the interaction of the genotype with the environment. recessive (allele): gene which can only be expressed when bo ...
... There are two types of mutation – chromosome mutation (e.g. Down’s syndrome) and gene mutation (e.g. Sickle cell anaemia). phenotype: physical appearance of an individual as a result of the interaction of the genotype with the environment. recessive (allele): gene which can only be expressed when bo ...
File
... • Males - XY Females - XX • Comment - The X and Y chromosomes are a homologous pair, but only for a small region at one tip. ...
... • Males - XY Females - XX • Comment - The X and Y chromosomes are a homologous pair, but only for a small region at one tip. ...
1. Dr. Swanson`s powerpoint lecture
... I. SRY codes for Testis-Determining Factor • Was the object of an intense search. • SRY gene on the Y chromosome was identified as the gene that codes for TDF: – SRY is translocated to X in rare XX males – SRY is absent from Y in rare XY females ...
... I. SRY codes for Testis-Determining Factor • Was the object of an intense search. • SRY gene on the Y chromosome was identified as the gene that codes for TDF: – SRY is translocated to X in rare XX males – SRY is absent from Y in rare XY females ...
Chromosomes
... • Males - XY Females - XX • Comment - The X and Y chromosomes are a homologous pair, but only for a small region at one tip. ...
... • Males - XY Females - XX • Comment - The X and Y chromosomes are a homologous pair, but only for a small region at one tip. ...
Chapter 3 PowerPoint
... can begin at 8 or 9 years of age; average 11 to 12 Advanced technology allows women to choose childbearing after menopause. ...
... can begin at 8 or 9 years of age; average 11 to 12 Advanced technology allows women to choose childbearing after menopause. ...
Supplementary Figure Legends
... Figure S3: Relationship between gene density and median intron length, demonstrating a genome-wide inverse correlation between intron size and gene density. Gene density of a chromosome is defined as average number of genes per Mb. Extreme chromosomes are indicated. Chromosome 18 has the longest med ...
... Figure S3: Relationship between gene density and median intron length, demonstrating a genome-wide inverse correlation between intron size and gene density. Gene density of a chromosome is defined as average number of genes per Mb. Extreme chromosomes are indicated. Chromosome 18 has the longest med ...
Consortium for Educational Communication Summary
... of 9:3:3:1 and a test cross ratio of 1:1:1:1 is always expected if genes show independent assortment. However, there are many cases where the law of independent assortment does not hold true. When the alleles are present on the same linkage group or chromosome, they are physically attached to each o ...
... of 9:3:3:1 and a test cross ratio of 1:1:1:1 is always expected if genes show independent assortment. However, there are many cases where the law of independent assortment does not hold true. When the alleles are present on the same linkage group or chromosome, they are physically attached to each o ...
GENETIC DISORDERS
... • Changes in chromosomes are known as mutations. • Mutations can be beneficial, neutral or harmful. • Because chromosomes are copied during interphase, all daughter cells (sperm or egg) will carry the mutation. ...
... • Changes in chromosomes are known as mutations. • Mutations can be beneficial, neutral or harmful. • Because chromosomes are copied during interphase, all daughter cells (sperm or egg) will carry the mutation. ...
(lectures 24
... crossing-over within them) and they will be strongly selected against. A new inversion will be rare, and thus may be able to fix only in small populations, or if it happened to occur in a highly fit chromosome. 11. Once they fix, the new population is not at any disadvantage (at least unless there a ...
... crossing-over within them) and they will be strongly selected against. A new inversion will be rare, and thus may be able to fix only in small populations, or if it happened to occur in a highly fit chromosome. 11. Once they fix, the new population is not at any disadvantage (at least unless there a ...
High Mutation Rates Have Driven Extensive Structural
... ca. 5% of Y is capable of recombining with X. These areas are known as pseudoautosomal regions(PAR) located at telomeres.The other 95% is known as the male-specific region(MSY). MSY contains 78 genes which code for 27 distinct proteins. MSY split into three euchromatic classes;1 ...
... ca. 5% of Y is capable of recombining with X. These areas are known as pseudoautosomal regions(PAR) located at telomeres.The other 95% is known as the male-specific region(MSY). MSY contains 78 genes which code for 27 distinct proteins. MSY split into three euchromatic classes;1 ...
Diploid zygote is very transient in lower eukaryotes
... environment. The sexual reproductive cycle involves the alternation of ______________ and _____________ states; diploid cells divide by _____________ to form haploid cells, and the haploid cells from two individuals fuse in pairs at fertilization to form new _________ cells. In the process, genomes ...
... environment. The sexual reproductive cycle involves the alternation of ______________ and _____________ states; diploid cells divide by _____________ to form haploid cells, and the haploid cells from two individuals fuse in pairs at fertilization to form new _________ cells. In the process, genomes ...
Y chromosome
... region of the Y (blue in diagram), have helped reveal the evolutionary history of the X and the Y. The region is so named because it cannot recombine, or exchange DNA, with the X. Only genes that still work are listed. About half have counterparts on the X (red); some of these are “housekeeping” gen ...
... region of the Y (blue in diagram), have helped reveal the evolutionary history of the X and the Y. The region is so named because it cannot recombine, or exchange DNA, with the X. Only genes that still work are listed. About half have counterparts on the X (red); some of these are “housekeeping” gen ...
Human karyotype
... Individuals with chromosome defects have high risk of errors in meiosis Refer to practice problems that look at pairing of chromosomes in heterozygotes 5. Polyploidy = extra full set of chromosomes ...
... Individuals with chromosome defects have high risk of errors in meiosis Refer to practice problems that look at pairing of chromosomes in heterozygotes 5. Polyploidy = extra full set of chromosomes ...
Genetics Test
... disorder. Which of the following phrases about this person is true? a. the allele is not passed on due to Y ...
... disorder. Which of the following phrases about this person is true? a. the allele is not passed on due to Y ...
Name
... 2. The offspring of two parents obtains a single copy of every gene from each parent. 3. A gamete must contain one complete set of genes. 4. Genes are located at specific positions on spindles. 5. A pair of corresponding chromosomes is homozygous. 6. One member of each homologous chromosome pair com ...
... 2. The offspring of two parents obtains a single copy of every gene from each parent. 3. A gamete must contain one complete set of genes. 4. Genes are located at specific positions on spindles. 5. A pair of corresponding chromosomes is homozygous. 6. One member of each homologous chromosome pair com ...
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.)