Genetics Review

Genetics Review! What is the genetic material of all organisms made up of 2 twisted strands of sugar-phosphate and nitrogen bases?Question 1DNA

1 What is a section of DNA located on a chromosome /controls traits?Question 2Gene

2 What is the passing of traits from parents to offspring?Question 3Heredity

3 Who is the father of genetics?Question 4Mendel

4 An organism receives how many genes for each trait and from whom?Question 52One from each parent

5 What is the gene that if present, its trait will always show up in the individual? (The allele is represented by a capital letter.)Question 6DominantRR or Rr6 What is the weaker gene that may be hidden and not show up in the trait of an individual unless there are two of them? (The allele is represented by a lowercase letter.)Question 7Recessiverr7 If an organism has 2 dominant or 2 recessive genes it is said to be what?

Question 8 Pure bred or PureBB bb

8 If an organism has 2 different genes it is said to be what?Question 9A Hybrid (Bb)Think of a hybrid car- runs on 2 different sources of energy

9Another hybrid

If an organism has 2 dominant or 2 recessive alleles it is said to be what?

Question 10Homozygous

10 Which is homozygous dominant, which is homozygous recessive, and heterozygous?

RR Rr rrQuestion 11Homozygous dominant- RRHomozygous recessive- rrHeterozygous- Rr11 If an organism has 2 different alleles it is said to be what?

Question 12Heterozygous

12Draw a Punnett Square- Make mom Pure TALL - Make dad SHORTGenotypes and Phenotypes of kidsQuestion 13TtTt

Tt

Tt

ttTT13Genotype- TtPhenotype- 100% tallUsing the letter H:Draw a Punnett SquareCross two HYBRID parentsQuestion 14HHHhHhhhHhHh14Looking at your Punnett Square:What is the probability of having offspring that are purebred recessive?Question 151:4 or 25%15

What is the word used that means:

a single letter that is written that represents a dominant or recessive trait passed from one parentQuestion 16Allele16

Write a genotype that says the offspring is purebred recessiveQuestion 17aa bb cc dd ee ff gg 17

Write a genotype that says the offspring is purebred dominantQuestion 18AA BB CC DD EE FF GG18

Write a genotype that says the offspring is a hybridQuestion 19Aa Dd Gg Nn Rr 19Question 20Set up and solve a punnett square from this information:Brown hair is dominant over blonde hair

Brad and Angelina are expecting children very soon. Brad is pure for brown hair. Surprisingly, Angelina is also pure, but for blonde hair.

How many children will be homozygous dominant? Homozygous recessive? Heterozygous?BbBbBbBbBBbb20Homozygous Dominant: noneHomozygous Recessive: noneHeterozygous: 4:4 or 100%It is a word on the word wall

Can be passed down by one of your parentsIt is the allele that covers up the weaker allele

Ex: tongue roller, widows peak

Question 21dominant23Question 24

Word on the word wall:

Each parent provides oneComes in pairsPair can be dominant, recessive, or both

Ex: a or A

alleleQuestion 25

Word on word wall:

Illustrates probabilityGenetic crossShows allele combinations

Punnett squareQuestion 26

Word on word wall:

Branch of scienceStudy of heredityExplains how traits are passed down from parents

Genetics Question 27

Word on word wall:

Found in every cellDNA is located here23 pairs of these

Chromosome What is one of several possible forms of a gene?alleleWhat is the physical appearance of an individual?phenotypeWhen the genotype consists of a dominant and a recessive allele, the phenotype will be like what allele?

Answer: dominantOn average, how many offspring of heterozygous parents will be homozygous recessive?Answer: 25%How many chromosomes are in human body cells?Answer: 46 or 23 pairsIf 2 organisms have the same phenotype, does that mean they have the same genotype?Answer: noIn peas, yellow color is dominant to green. What will the colors of the offspring be between a homozygous yellow and a homozygous green?

What would their genotypes/phenotypes be?Phenotype: They will all be yellow

YyCould two brown-eyed parents have a blue-eyed child? Explain by creating a punnett square!Answer: yes, because they would both have to be heterozygous (they both have to carry a recessive allele for blue eyes)

What are factors that control traits?Answer: genesWhat is the gene makeup of a trait?genotypeChallengeA blue eyed man both of whose parents were brown eyed, Marries a brown eyed woman whose father was blue eyed and whose mother was brown eyed. The man and this woman have a blue eyed child. What are the genotypes of all individuals listed.AnswerDads dad- Bb Moms dad- bbDads mom- Bb Moms mom- Bb or BBDad-bb Mom- Bb

Child- bb