IB Biology--Chromosome Review Activity
... 4. Look @ the visuals from the BioNinja site and describe what appears to be the basic difference between active and less active genes? What is preventing the less active genes from ...
... 4. Look @ the visuals from the BioNinja site and describe what appears to be the basic difference between active and less active genes? What is preventing the less active genes from ...
nondisjunction
... accounted for in terms of sex chromosomes and sex-linked traits. Bridges examined the chromosomes in the vermillion female and found that it had two X chromosomes (XX) and a Y chromosome. Thus the vermillion condition could be represented as XrXrY. The extra X chromosome produces a female even if a ...
... accounted for in terms of sex chromosomes and sex-linked traits. Bridges examined the chromosomes in the vermillion female and found that it had two X chromosomes (XX) and a Y chromosome. Thus the vermillion condition could be represented as XrXrY. The extra X chromosome produces a female even if a ...
SexChromosomes - life.illinois.edu
... Presence of a single gene (SRY) that usually, but not always, occurs on the Y chromosome. If the Y chromosome is missing this gene (deleted) or has a non-functional mutation in the gene, an XY individual can be a perfectly normal female. If the SRY gene becomes translocated to another chromosome, an ...
... Presence of a single gene (SRY) that usually, but not always, occurs on the Y chromosome. If the Y chromosome is missing this gene (deleted) or has a non-functional mutation in the gene, an XY individual can be a perfectly normal female. If the SRY gene becomes translocated to another chromosome, an ...
TEACHER NOTES AND ANSWERS Section 7.1
... Autosomes—all chromosomes other than sex chromosomes; do not directly determine an organism’s sex Autosomal gene expression—two alleles that interact to produce a phenotypic trait; Inheritance of autosomes—Punnett square should demonstrate that inheritance occurs according to Mendel’s rules, one all ...
... Autosomes—all chromosomes other than sex chromosomes; do not directly determine an organism’s sex Autosomal gene expression—two alleles that interact to produce a phenotypic trait; Inheritance of autosomes—Punnett square should demonstrate that inheritance occurs according to Mendel’s rules, one all ...
Print Preview - C:\WINDOWS\TEMP\e3temp_6820\.aptcache
... should indicate that females (XX) can only pass on an X chromosome and males (XY) can only pass on either Autosomal gene expression: Two alleles that one X or one Y chromosome interact to produce a phenotypic trait; ...
... should indicate that females (XX) can only pass on an X chromosome and males (XY) can only pass on either Autosomal gene expression: Two alleles that one X or one Y chromosome interact to produce a phenotypic trait; ...
File - Mr. Krueger`s Biology
... should indicate that females (XX) can only pass on an X chromosome and males (XY) can only pass on either Autosomal gene expression: Two alleles that one X or one Y chromosome interact to produce a phenotypic trait; ...
... should indicate that females (XX) can only pass on an X chromosome and males (XY) can only pass on either Autosomal gene expression: Two alleles that one X or one Y chromosome interact to produce a phenotypic trait; ...
371_section quiz
... a. does not have the disorder but can pass it on to offspring. b. can develop the disorder later in life but cannot pass it on. c. has a dominant normal allele that has been inactivated. d. passes the disorder to offspring on the Y chromosome only. 4. Genes that are located on sex chromosomes are ca ...
... a. does not have the disorder but can pass it on to offspring. b. can develop the disorder later in life but cannot pass it on. c. has a dominant normal allele that has been inactivated. d. passes the disorder to offspring on the Y chromosome only. 4. Genes that are located on sex chromosomes are ca ...
Chromosomes and Mapping
... • Sex-linked traits: controlled by genes present on the X chromosome • Certain genetic diseases affect males to a greater degree than females – X-linked recessive alleles • Red-green color blindness • Hemophilia ...
... • Sex-linked traits: controlled by genes present on the X chromosome • Certain genetic diseases affect males to a greater degree than females – X-linked recessive alleles • Red-green color blindness • Hemophilia ...
Chapter 14 – Human Genome
... Unusual numbers of sex chromosomes Turner’s syndrome – females Have only 1 X chromosome Are sterile, sex organs may not develop Klinefelter’s syndrome – males Have an extra X – XXY Usually sterile ...
... Unusual numbers of sex chromosomes Turner’s syndrome – females Have only 1 X chromosome Are sterile, sex organs may not develop Klinefelter’s syndrome – males Have an extra X – XXY Usually sterile ...
Cloze passage 3
... p) A biologist who worked with fruit fly to identify sex-linkage q) The features or traits of an organism are controlled by both genes and the ……………. r) The base complementary to thymine s) A model we used to represent chromosomes t) A biological name for a family tree u) A colourblind male need onl ...
... p) A biologist who worked with fruit fly to identify sex-linkage q) The features or traits of an organism are controlled by both genes and the ……………. r) The base complementary to thymine s) A model we used to represent chromosomes t) A biological name for a family tree u) A colourblind male need onl ...
HEREDITY
... ¢ Genes for one trait (like hair color) have NO effect on genes of another trait (like eye color) ...
... ¢ Genes for one trait (like hair color) have NO effect on genes of another trait (like eye color) ...
CH-14 Sect 14
... d. Human genes located close together on the same chromosome tend to be inherited together. 2. What are sec-linked genes? (pg 350-351) __________________________________________________________________ __________________________________________________________________________________________________ ...
... d. Human genes located close together on the same chromosome tend to be inherited together. 2. What are sec-linked genes? (pg 350-351) __________________________________________________________________ __________________________________________________________________________________________________ ...
Sex-linked Traits in Humans - Southington Public Schools
... Males have XY as their sex chromosomes; females have XX. Sex-linked Traits in Humans Because the sex chromosomes are a matched pair in females and an unmatched pair in males, traits on these genes show unusual patterns of inheritance. Traits that have their genes on the X chromosome are called X-lin ...
... Males have XY as their sex chromosomes; females have XX. Sex-linked Traits in Humans Because the sex chromosomes are a matched pair in females and an unmatched pair in males, traits on these genes show unusual patterns of inheritance. Traits that have their genes on the X chromosome are called X-lin ...
Barbara McClintock
... She found 2 new dominant genetic loci that she names Dissociatior (Ds) and Activator (Ac) ...
... She found 2 new dominant genetic loci that she names Dissociatior (Ds) and Activator (Ac) ...
Lyonization - National Foundation for Ectodermal Dysplasias
... (the term lyonization is in honor of Mary Lyon, the scientist who first offered this explanation for gene dosage compensation). This inactivation process does not occur in males because they have only one X chromosome. This process is most often random. The specific X turns off in each cell is an ac ...
... (the term lyonization is in honor of Mary Lyon, the scientist who first offered this explanation for gene dosage compensation). This inactivation process does not occur in males because they have only one X chromosome. This process is most often random. The specific X turns off in each cell is an ac ...
Human Genome notes
... • In pedigrees, circles represent females and squares represent males • Symbols that are shaded indicates the individual expresses the trait • No shading means the trait is not exhibited • Important to understand that most traits are polygenic and also can be influenced by ...
... • In pedigrees, circles represent females and squares represent males • Symbols that are shaded indicates the individual expresses the trait • No shading means the trait is not exhibited • Important to understand that most traits are polygenic and also can be influenced by ...
Human Heredity - Catawba County Schools
... grouped together in pairs • 23 pairs (46 total) • Two are sex chromosomes (pair #23) – Female genotype – XX – Male genotype – XY • Autosomes – remaining 44 chromosomes – Pair #s 1-22 ...
... grouped together in pairs • 23 pairs (46 total) • Two are sex chromosomes (pair #23) – Female genotype – XX – Male genotype – XY • Autosomes – remaining 44 chromosomes – Pair #s 1-22 ...
Chromomere - aqinfo.com
... Chromomere Bead like projections – along entire length of polytene chromosome Heavier stained than inter-chromomeric regions Clear in dipteran salivary gland chromosome as dark bands Genes are located within chromomere One chromomere – single gene Evidence – local coiling of continuous D ...
... Chromomere Bead like projections – along entire length of polytene chromosome Heavier stained than inter-chromomeric regions Clear in dipteran salivary gland chromosome as dark bands Genes are located within chromomere One chromomere – single gene Evidence – local coiling of continuous D ...
Sex-linked genes, genes located on one of the sex chromosomes (X
... recessive mutations, she would have to have two copies of the allele (X'X'). ...
... recessive mutations, she would have to have two copies of the allele (X'X'). ...
X n Y
... Sex influenced traits • The gene is NOT on a sex chromosome, but SEX affects the phenotype • Ex-baldness-dominant in males, recessive in women – If ‘B’ represents bald and ‘b’ is hairy then Men must be bb to keep hair Women can be Bb or bb to keep hair ...
... Sex influenced traits • The gene is NOT on a sex chromosome, but SEX affects the phenotype • Ex-baldness-dominant in males, recessive in women – If ‘B’ represents bald and ‘b’ is hairy then Men must be bb to keep hair Women can be Bb or bb to keep hair ...
Chromosomes, Chromatids, Loci, and Alleles
... During interphase, the cell is functioning normally and the DNA is unraveled and impossible to see. Then, at some point in the cell’s life cycle, the cell will start to prepare for cell division through either mitosis (somatic cells) or meiosis (sex cells). The DNA will first replicate in the synthe ...
... During interphase, the cell is functioning normally and the DNA is unraveled and impossible to see. Then, at some point in the cell’s life cycle, the cell will start to prepare for cell division through either mitosis (somatic cells) or meiosis (sex cells). The DNA will first replicate in the synthe ...
Chapter 15 - WordPress.com
... _______________________ occurs when homologous chromosomes or sister chromatids do not separate properly during meiosis. What are the two scenarios that can take place in meiosis to cause non-disjunction? ...
... _______________________ occurs when homologous chromosomes or sister chromatids do not separate properly during meiosis. What are the two scenarios that can take place in meiosis to cause non-disjunction? ...
Chromosome Theory & Heredity
... – Located in close association with one another – Tend to be inherited together – Generally do not follow Mendel's law of independent assortment ...
... – Located in close association with one another – Tend to be inherited together – Generally do not follow Mendel's law of independent assortment ...
SexChrom_posted
... At one time , it was claim ed that XYY males are prone to violent or antisocial behav ior, based on eleva ted incidenc e of 47,XYY a mong inca rcerated men. Now though t to be due to higher incidence of moderate mental retardation than for XY males. ...
... At one time , it was claim ed that XYY males are prone to violent or antisocial behav ior, based on eleva ted incidenc e of 47,XYY a mong inca rcerated men. Now though t to be due to higher incidence of moderate mental retardation than for XY males. ...
I. Down Syndrome - Plain Local Schools
... Section Goal: The student will relate Down’s syndrome and non-separation of chromosomes, describe how chromosomes can be damaged and explain how a “jumping gene” can affect other genes. Vocabulary: 1. Trisomy 21 2. Down’s syndrome 3. Nondisjunction 4. Duplication 5. Deletion 6. Inversion 7. Transloc ...
... Section Goal: The student will relate Down’s syndrome and non-separation of chromosomes, describe how chromosomes can be damaged and explain how a “jumping gene” can affect other genes. Vocabulary: 1. Trisomy 21 2. Down’s syndrome 3. Nondisjunction 4. Duplication 5. Deletion 6. Inversion 7. Transloc ...
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.)