MORE GENETICS PROBLEMS

Slides:

Advertisements

Similar presentations

Advertisements

Simple Punnett Square Warm-up

In cattle the polled (hornless) condition (P) is dominant over the horned (p) phenotype. A particular polled bull is bred to three cows. 1) With cow.

Pattern Of Inheritance

Chap 9/11 : Fundamentals of Genetics

1. The father of genetics is_____ A. Charles Darwin B. Gregor Mendel C

Genetics: The Science of Heredity

1 Gregor Johann Mendel  Austrian monk  Studied the inheritance of traits in pea plants  Developed the laws of inheritance  Mendel's work was not recognized.

Heredity and Genetics Part Two Dihybrid Crosses. Review of Monohybrid Crosses Remember, monohybrid crosses involve only ONE trait Practice… In fruit flies,

Genetic Crosses Review

Fnord babies ~ will be collected ~ In Fnords, orange (O) fur is dominant over blue fur (o). An orange fnord and a blue fnord mate, and produce 314 orange.

Genetics Chapters 9-1 & 9-2. Incomplete dominance There is no dominant allele or recessive allele The 2 alleles are blended and make up a new physical.

Co-dominant and Incomplete dominance

GENETICS….. FINALLY!.  We all have different traits/characteristics  Traits – eye color, hair color and texture, height, etc.

Genotype vs Phenotype Genotype: An organism’s genetic makeup which consists of the alleles that an organism inherits from it’s parents (ex: Ee, EE, or.

Different Forms of Genetic Expression Genetic expression is how a gene is “shown” (phenotype) We have been using a model known as complete dominance.

Student Impact! High Fives: What did you like about the genetics unit? What would you like to do again? Anything that you would like me to know Nudges.

Genetics Review.

Genetics and Probability Probability refers to the chances of something happening. Probability can be used to predict. In genetics, probability can be.

Phenotypes and Genotypes Mendel’s experiments showed that “yellow” pea plants are not all the same. Two organisms can look alike but have different gene.

 IN  What are the probabilities of a monohybrid cross between two heterozygous parents?  Flower color R=redr=white.

Punnett Squares; #3 & #4.

Mendel, Genes and Gene Interactions §The study of inheritance is called genetics. A monk by the name of Gregor Mendel suspected that heredity depended.

Catalyst – April 23, 2010 D = dimples, d = no dimples F = freckles, f = no freckles 1.Show the dihybrid cross for the following: Female - Heterozygous.

Punnett Squares and Probability. What is a punnett square and why do we use it? What is it?  A grid system for predicting all possible genotypes of offspring.

Genetics Word Problems

Multiple Alleles Practice Problems.

Genetics. Gregor Mendel: Father of Genetics Genetics: study of heredity Heredity: passing traits from parent to offspring Used peas to study heredity.

DO NOW Date: 10/13 Put homework away. In your own words: Describe why two brown-haired parents can have a blonde-haired child. Use complete sentences.

Genetic Crosses Section 9.2. Genotype  The genetic makeup of an organism  Consists of the alleles that the organism inherits from its parents  Example:

SBI 3U Incomplete Dominance Codominance. Mendel’s experiments illustrate complete dominance - offspring always resembled one of the two parents The dominant.

Monohybrid Crosses These crosses involve one pair of contrasting traits. There are 5 different types which we will discuss.

Genetics Review. Ready???? 1.Yes 2.No 10 Who became known as the father of genetics? 1.Watson 2.Einstein 3.Mendel 4.Bohr 10.

Sex-linked traits, Blood Types

+ Intro to Punnett Squares Mrs. MacWilliams Biology.

Standard 2.2 Molecular basis of inheritance A sorting and recombination of genes during sexual reproduction results in a great variety of possible gene.

Genetic Crosses How to predict the probable genetic makeup and appearance of offspring resulting from specified crosses.

Genetics Notes Who is Gregor Mendel? Principle of Independent Assortment – Inheritance of one trait has no effect on the inheritance of another trait “Father.

Genetic Crosses...and Zygosity. Heterozygous: Having two DIFFERENT alleles for a trait. Homozygous: Having two of the SAME allele for a trait.

Genetic Story Problems

#3 – List EACH trait you thought the Potato Head child would have: Eye Color Ear Color: Nose Color: Lip Color: Skin Color:

NOTES: 11.3 Exceptions to Mendelian Genetics! Beyond Dominant and Recessive Alleles ● Some alleles are neither dominant nor recessive, and many traits.

Warm-up In humans: T = ability to roll the tongue t = inability to roll the tongue E = unattached earlobes e = attached earlobes TtEE x Ttee What are the.

Genes that are located on the sex chromosomes are sex-linked genes. In mammals, individuals with two X chromosomes, an XX genotype, are females. Individuals.

Mendel Mendel Genetic † Potpourri FINAL JEOPARDY! FINAL JEOPARDY!

Sex-Linked inheritance Punnett squares

Review Questions ________________ is the scientific study of heredity. A) Traits B) Alleles C) Genetics D) Geneology.

Warm Up Turn in Aliens. Pick Up Warm Up. Pick Up Simple Genetics Practice Problems.

Female Male Important to know before getting started:

2. Find genotype ratio (%) 3. Find phenotype ratio (%)

Genetics 101: Heredity & Probability Essential questions: EQ: What makes me the way I am? EQ: What are the chances that certain traits will be passed on.

Introduction to Mendelian Genetics

Genetics Word Problems

Genetics Unit 1 Review.

Non-Mendelian Genetics

In unicorns, a shiny horn is dominant

Genetics Punnett Squares.

Genetics definitions Label each chromosome pair as homozygous dominant, homozygous recessive, or heterozygous with definitions Label dominant.

Important to know before getting started:

What are incomplete dominance and codominance?

Simple Genetics Thursday, October 19, 2011.

Review Brown eyes are dominant to blue eyes. A purebred brown eyed person has children with a blue eyed person. What are the genotypic and phenotypic.

Genetics Word Problems

Mendel’s Laws Law of Segregation -Genes are found in pairs

Unit 8: Mendelian Genetics 8.4 Incomplete Dominance

Genetics Word Problems

Unit 4 - Genetics – heredity Review

Genetics Word Problems

Presentation transcript:

MORE GENETICS PROBLEMS Dragons either have forked tongues or they do not. It is a trait determined by a pair of genes in each dragon (use F and f as genes). If dragons with forked tongues mate the offspring always have forked tongues. If a dragon without a forked tongue that was homozygous for the trait mated with a forked tongue dragon what would be the phenotypic ratio of their offspring?

What would be the genotypic ratios if one of the previous dragon offspring mated with this one?

If the dragon above had offspring with forked tongues could both of the above dragon’s parents NOT have forked tongues? Could its mate NOT have a forked tongue?

Diagram the genotypic relations among the dragon generations from the previous slide.

Suppose you run a dragon ranch in Rhode Island (Houston metro is bigger than the entire state!) with plenty of dragons having both kinds of tongue. How could you determine whether or not your prize male dragon without a forked tongue is heterozygous?

DIHYBRID GENETICS PROBLEMS Some dragons have horns as a dominant trait (use H for the dominant gene) and others are hornless (use h for the recessive gene). HORNLESS HORNED If a hornless dragon WITHOUT a forked tongue mates with a horned forked- tongue dragon and they can produce ONLY some offspring that are horned with forked tongues and some that are hornless WITHOUT forked tongues what are the genotypes of the parents?

What would be the genotypic and phenotypic ratios for a cross between the two kinds of offspring from the preceding slide?

If a horned dragon without a forked tongue that had a parent with a forked tongue and another parent without horns mates with a horned forked-tongue dragon and they have a hornless offspring without a forked tongue what are the most probable genotypes of all the dragons mentioned here?

Red-eyed dragons always produce offspring with red eyes and white-eyed dragons always produce offspring with white eyes BUT a red-eyed dragon and a white-eyed dragon will always produce offspring with pink eyes. What would be the genotypic and phenotypic ratios for the offspring of a red-eyed dragon and a pink-eyed dragon?

If a pink-eyed hornless dragon mates with a red-eyed horned dragon that had a hornless parent what would the genotypic and phenotypic ratios of their possible offspring be?

Dragons have only four colors to their skin (Epidermis): red, black, red-black, and yellow. Skin color results from a gene locus with three possible alleles: ER, EB, and ER and EB are both dominant to e but not to each other. Yellow skin results from a homozygous recessive genotype and red-black skin results from genotypes heterozygous with ER and EB. If a red dragon and a black dragon produce a yellow dragon what are all their genotypes? What other colors would be possible for the yellow dragon’s siblings?

If a red female dragon produced a yellow child what color male dragons could NOT be the father?

A red-black pink-eyed dragon and a yellow white-eyed dragon produce children. What would be the expected phenotypic and genotypic ratios of those offspring?

Most dragons breathe fire but some cannot, and these latter are mostly males. Needless to say, this puts a real crimp in their ability to destroy villages and what not! Lack of fire-breathing is sex-linked (F=fire and f=no fire). If a fire-breathing male and a fire-breathing female that had a father that could not breathe fire (How did he ever find a fire-breathing mate?!) produce offspring what kinds could they produce?