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Mendelian Genetics Problems. Who’s the Daddy?. Meiosis. Pedigrees. Mendel. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500.

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  1. Mendelian Genetics Problems Who’s the Daddy? Meiosis Pedigrees Mendel 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

  2. In pea plants, tall (T) is dominant to (t). What is the GENOTYPE of a heterozygous tall plant? Tt

  3. In Martians, blue skin is dominant to green skin. What is the PHENOTYPE of a Martian who is homozygous recessive? green

  4. In guinea pigs, black fur is dominant to white fur. Two heterozygous guinea pigs are crossed. What are the chances of these guinea pigs producing a white offspring. ¼ or 25%

  5. In peas, purple flower color is dominant to white. A true-bred purple pea plant is crossed with a true-bred white. What is the phenotype of the offspring? All purple

  6. If a child has no signs of a particular nasty disease Ukitis, but both parents have suffered from this unfortunate disorder. What Genotype could their parents be? Bb

  7. In Martians, blue skin (B) is dominant to green skin (b). Two blue-skinned Martians have a green-skinned offspring. What is the genotype of the parents? Bb

  8. A man with genotype AA for freckles and woman with no freckles had a baby with no freckles. Could this man be the baby daddy? • NO

  9. In peas, smooth seeds are dominant to wrinkled. A cross between a smooth plant and a wrinkled plant results in ALL smooth plants. What is the genotype of the parents? SS x ss

  10. In radishes, red color (R) is incompletely dominant over white (W). The heterozyous condition is purple. What are the genotypes of the parents if all of the offspring are purple? RR x WW

  11. Offspring of a cross between two pea plants results in a 9:3:3:1 ratio. Describe the genotypes of the parents. • heterozygous

  12. Meiosis results in gametes that are _______ in chromosome number. HAPLOID

  13. Pairs of chromosomes are called ____________ pairs. HOMOLOGOUS

  14. Crossing over occurs during what phase of meiosis? Prophase I

  15. Nondisjunction occurs during what phase of meiosis? Anaphase I or II

  16. Meiosis produces gametes that have :1---- # of chromosomes2---- How many sets of chromosomes3--- genetically?______________ HOMOLOGOUS CHROMOSOMES SISTER CHROMATIDS

  17. The pedigree below shows the trait for feather color in parrots. Blue color (B) is dominant to green color (b). Is individual C male or female? A B C D E F male

  18. The pedigree below shows the trait for feather color in parrots. Blue color (B) is dominant to green color (b). If individual C is green, what is the genotype of the parents? A B C D E F Bb

  19. The following pedigree shows incidence of Huntington’s (H) disease, a DOMINANT disease. What is the genotype of individual A? A Hh

  20. The following pedigree shows incidence of Huntington’s (H) disease, a DOMINANT disease. What is the genotype of all of the white shapes? hh

  21. What mode of inheritance is demonstrated in the pedigree below. Is it dominant or recessive? X-linked recessive

  22. A red flower and a white flower produce only pink flowers. This is an example of _________ dominance. INCOMPLETE

  23. Mom is heterozygous type A and Dad is homozygous type B. What are the chances of them having a child with type AB blood? ½ or 50%

  24. Hemophilia is an X-linked disease. It is rare but it is mostly found in males. Males get this disease from their mothers. Why? Males inherit an X chromosome from their mothers. Only X chromosomes carry X-linked diseases

  25. A man and woman, both with normal vision, give birth to a son with colorblindness. What are the genotypes of all of the individuals? Mom: XN Xn Dad: XN Y Son: Xn Y

  26. What are the chances that a man with colorblindness and a female who is a carrier with have colorblind child? 25%

  27. Mendel is known as the father of modern GENETICS

  28. What was Mendel’s profession beside science. Monk

  29. Mendel’s Law of _______ states that allele pairs separate independently during the formation of gametes. This means that traits are transmitted to offspring independently of one another INDEPENDENT ASSORTMENT

  30. Mendel’s worked with how many different variables when he experimented with pea plants 7

  31. Mendel’s Law of _____ states that allele pairs separate or segregate during gamete formation, and randomly unite at fertilization. SEGREGATION

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