Unit 8: Mendelian Genetics 8

Slides:



Advertisements
Similar presentations
Genetics The study of potentials of passing information from one generation to the next.
Advertisements

Investigating different patterns of inheritance
Blood Group Notes.
What information can be revealed by a Punnett square. A
Mendel’s Laws of Heredity
Sex-Linked Punnett Square Notes
Can heredity follow different rules?
Sex Linked Traits.
SEX-LINKED TRAITS Solving pedigrees for traits with genes located on the X and Y chromosome.
D. Multiple Alleles – Instead of having two forms of an allele, there are more than two for one gene. i. The best example for humans is blood. There 3.
WARM UP # 1/31 Unscramble the words from this chapter Bonus – 1 st 3 people who show me get EC slips! 1. D M E N L E 2. L A L E L 3. M E H C O S R O O.
DO NOW WRITE THE DEFINTION FOR EACH OF THE FOLLOWING USE YOUR NOTES!!!
SEX-LINKED TRAITS. Karyotype: a picture of chromosomes.
NOTES 21 - Sex-Linked Inheritance
Mendelian Exceptions & Sex- linked Genetics Objective: E4 - Predict possible outcomes of non-Mendelian inheritance & explain how sex is determined.
Sex-Linked Traits. Inheritance of Traits  X-linked Disorders - occur mainly in males because the mother usually donates the recessive allele and males.
Sex Linked Traits. Human Chromosomes Chromosomes are only visible during cell division (mitosis/meiosis). Chromosomes are only visible during cell division.
Color Blindness Test What do YOU see?. Image 1 Both the normal and those with all sort of color vision deficiencies read it as 12.
CHAPTER 12 SEX-LINKED TRAITS
Non-Mendelian: Sex- Linked Traits
Science 10 Unit 1 GENETICS.
Natiwya Saddler Mitchell Loll
Sex-Linked Punnett Square Notes
Sex Linked Traits.
Sex Linked Traits Humans have 23 pairs of chromosomes.
Sex Linked Traits J. R. Jones Spring 2008.
SEX-LINKED GENES.
SEX-LINKED GENES.
Sex-LINKED GENETICS.
CHAPTER 12 SEX-LINKED TRAITS
Blood Group Notes.
IN 147 Headings Vocabulary Important Info
Human Genetics.
Sex-Linked Traits Boy or Girl? The Y Chromosome “Decides” Y chromosome
Non-Mendelian: Sex- Linked Traits
Notes: Sex-Linked Traits
Genetics Video!
Extensions on Mendelian Genetics
Science 10 Unit 1 GENETICS.
Sex-Linked Inheritance.
Genetics Jeopardy!.
Headings Vocabulary Important Info
Reminders Unit 8 Exam- Tuesday, March, 21st
Complete the pedigree tracing red hair in this family
Sex-Linked Traits.
Sex-Linked Traits.
Understanding Inheritance
Punnett Squares: Part 2.
Punnett Squares: Part 2.
Daily Routine Sit in your appropriate seat quietly
Sex-linked Traits Using punnett squares.
Sex-Linked Punnett Square Notes
Sex Linked Traits Humans have 23 pairs of chromosomes.
Non-Mendelian Genetics
Sex Linked Genes.
Sex-Linked Traits.
X-Linked Inheritance (Sex Linked)
WARM UP What’s the difference between these two karyotypes?
Non-Mendelian: Sex- Linked Traits
Sex Linked Traits Males vs. Females.
X-linked genetics traits
Sex Linked Traits Humans have 23 pairs of chromosomes.
Sex Linked Inheritance
Sex Linked Traits Humans have 23 pairs of chromosomes.
Sex-Linked Traits.
Picture of your chromosomes
Sex Linked Traits Humans have 23 pairs of chromosomes.
Sex-Linked Inheritance
Sex-Linked Traits.
(Where did you get your genes?)
Presentation transcript:

Unit 8: Mendelian Genetics 8 Unit 8: Mendelian Genetics 8.6 Other Patterns of Inheritance: Sex-Linked Traits

Humans have 22 pairs of autosomes and 1 pair of sex chromosomes. Males are XY Males donate their Y chromosome to their sons only and their X chromosome to their daughters. They determine the sex of the child! Females are XX Females donate one or the other of their X chromosomes to their sons and daughters. Chromosomes

Sex-Linked The gene is carried on a sex chromosome (x or y) Occur most often in males because they only receive one X chromosome from their mother. Most of these genes are recessive, which means mom can be a carrier and pass the trait to her offspring A carrier is a female who is heterozygous for a trait and can pass the trait on to her offspring but does not show symptoms of the trait. Examples: Hemophilia Red-green color blindness Sex-Linked

Using a Punnett Square for Sex-Linked Determine the genotypes of the parents Mom is a carrier: Xx heterozygous Mom is NOT a carrier: XX homozygous Mom shows trait: xx homozygous recessive Dad “normal”: XY Dad with trait: xY Place the traits onto the Punnett square as you have before Cross the traits in the square Determine the genotype and phenotype of the offspring Male = XY, xY Female = XX, Xx Using a Punnett Square for Sex-Linked

Example with Sex-Linked Carol is a “carrier” for a recessive sex-linked trait that causes red- green color blindness. Carol has a baby with Bill, who is normal. a. parent genotype b. offspring genotype c. offspring phenotype d. proportion of male offspring e. Proportion of offspring with red-green color blindness.

Parents: The McBride’s: type O and AB (1 Punnett) The Gonzales’: type A and B (4 Punnetts) The Pepronis: type A and O (2 Punnetts) Children: Baby A is type AB Baby B is type O Baby C is type B 1. Who are the parents of baby A? A: Gonzales 2. Who are the parents of baby B? A: Pepronis 3. Who are the parents of baby C? A: McBride Practice In a hospital, 3 babies were born simultaneously during a thunderstorm. The lights went off and the babies were mixed up. The hospital wants to match the baby with its parents by looking at the blood types. Can you help?