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A human baby has two X chromosomes.  Its sex is ______________.
A human baby has two X chromosomes. Its sex is FEMALE. If it is XY it is a MALE. Remember:  “if it’s got a Y, it’s a guy!”
The father of genetics is an Austrian monk named ____________________.
The father of genetics is an Austrian monk named GREGOR MENDEL.
Purebred dogs often show variations in coat color. This is an example of ____________________ dominance in genetics.
Purebred dogs (or horses)often show variations in coat color. This is an example of INCOMPLETE dominance in genetics.
Every sex cell has ____________________ allele(s) for each trait.
Every sex cell has ONE allele(s) for each trait.
What is selective breeding?
Selecting plants or animals with the most desired traits to breed for the next generation.
You are looking at four  T all pea plants. What are their phenotypes  and  genotypes? genotype(s):_________________        phenotype(s): _______________
You are looking at four  T all pea plants. What are their phenotypes  and  genotypes? genotype(s):TT OR Tt  phenotype(s): TALL Genotype =genetic makeup Phenotype=what you can physically see
What possible  geno types will the offspring have if the parents' blood types are O and AB?
What possible  geno types will the offspring have if the parents' blood types are O and AB? O O A AO AO B BO BO Remember the GENOTYPE is the GENETIC makeup so the GENOTYPES are the possible outcomes that are represented by the PAIRS of ALLELES in the Punnett square. GENOTYPES: AO, BO
Mendel called plants that received  different  alleles for a trait from each parent ____.
Mendel called plants that received  different  alleles for a trait from each parent a  HYBRID . This car is a HYBRID of a gasoline and an electric car.
Blood type in humans is controlled by ____  alleles .
Blood type in humans is controlled by THREE  alleles . (A, B, O ) These combination of alleles gives us 4 different phenotypes of blood. (A,B,AB,O) They also give us 6 different Genotypes (AA,AO,BB,BO,AB,OO)
In a Punnett square, a capital letter stands for a ____ allele.
In a Punnett square, a capital letter stands for a DOMINANT allele
Pedigree?
PEDIGREE: tool for tracing a trait through a family
Heterozygous?
Heterozygous: organisms with two  different  alleles for a trait
incomplete dominance
incomplete dominance: when an intermediate form is expressed in offspring
polygenic inheritance?
polygenic inheritance: when more than two alleles control a trait Traits that are affected by more than one gene are called  polygenic traits . The genes that affect a polygenic trait may be closely linked on a chromosome, unlinked on a chromosome, or on different chromosomes. Polygenic traits are often difficult for geneticists to track because the polygenic trait may have many alleles. Also, independent assortment ensures the genes combine differently in gametes. Therefore, many different intermediate phenotypes exist in offspring. Eye color ( Figure   below ), and skin color are examples of polygenic traits in humans.  Eye color and skin color are examples of polygenic traits; they are influenced by more than one gene.
Homozygous?
Homozygous: when there are two alleles that are exactly the same
KNOW how to do Punnett squares! KNOW your vocab! (especially homozygous, heterozygous, genotype, and phenotype) if you don’t KNOW these words you will NOT do well on the test.  Do your BEST! There are not many grade opportunities left! Make your Mama PROUD!

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Study guide genetics

  • 1. A human baby has two X chromosomes. Its sex is ______________.
  • 2. A human baby has two X chromosomes. Its sex is FEMALE. If it is XY it is a MALE. Remember: “if it’s got a Y, it’s a guy!”
  • 3. The father of genetics is an Austrian monk named ____________________.
  • 4. The father of genetics is an Austrian monk named GREGOR MENDEL.
  • 5. Purebred dogs often show variations in coat color. This is an example of ____________________ dominance in genetics.
  • 6. Purebred dogs (or horses)often show variations in coat color. This is an example of INCOMPLETE dominance in genetics.
  • 7. Every sex cell has ____________________ allele(s) for each trait.
  • 8. Every sex cell has ONE allele(s) for each trait.
  • 9. What is selective breeding?
  • 10. Selecting plants or animals with the most desired traits to breed for the next generation.
  • 11. You are looking at four T all pea plants. What are their phenotypes and genotypes? genotype(s):_________________       phenotype(s): _______________
  • 12. You are looking at four T all pea plants. What are their phenotypes and genotypes? genotype(s):TT OR Tt phenotype(s): TALL Genotype =genetic makeup Phenotype=what you can physically see
  • 13. What possible geno types will the offspring have if the parents' blood types are O and AB?
  • 14. What possible geno types will the offspring have if the parents' blood types are O and AB? O O A AO AO B BO BO Remember the GENOTYPE is the GENETIC makeup so the GENOTYPES are the possible outcomes that are represented by the PAIRS of ALLELES in the Punnett square. GENOTYPES: AO, BO
  • 15. Mendel called plants that received different alleles for a trait from each parent ____.
  • 16. Mendel called plants that received different alleles for a trait from each parent a HYBRID . This car is a HYBRID of a gasoline and an electric car.
  • 17. Blood type in humans is controlled by ____ alleles .
  • 18. Blood type in humans is controlled by THREE alleles . (A, B, O ) These combination of alleles gives us 4 different phenotypes of blood. (A,B,AB,O) They also give us 6 different Genotypes (AA,AO,BB,BO,AB,OO)
  • 19. In a Punnett square, a capital letter stands for a ____ allele.
  • 20. In a Punnett square, a capital letter stands for a DOMINANT allele
  • 22. PEDIGREE: tool for tracing a trait through a family
  • 24. Heterozygous: organisms with two different alleles for a trait
  • 26. incomplete dominance: when an intermediate form is expressed in offspring
  • 28. polygenic inheritance: when more than two alleles control a trait Traits that are affected by more than one gene are called polygenic traits . The genes that affect a polygenic trait may be closely linked on a chromosome, unlinked on a chromosome, or on different chromosomes. Polygenic traits are often difficult for geneticists to track because the polygenic trait may have many alleles. Also, independent assortment ensures the genes combine differently in gametes. Therefore, many different intermediate phenotypes exist in offspring. Eye color ( Figure below ), and skin color are examples of polygenic traits in humans. Eye color and skin color are examples of polygenic traits; they are influenced by more than one gene.
  • 30. Homozygous: when there are two alleles that are exactly the same
  • 31. KNOW how to do Punnett squares! KNOW your vocab! (especially homozygous, heterozygous, genotype, and phenotype) if you don’t KNOW these words you will NOT do well on the test. Do your BEST! There are not many grade opportunities left! Make your Mama PROUD!