PROBLEM 1:
1. 3
2. 6
3. 5
4. Individual 2 is male (square), genotype Aa; Individual 4 is female (circle), genotype aa.
5. Aa
6. 0% (Individual 5 has genotype aa, so cannot pass dominant allele A; child must inherit a from both parents)
7. 50% (Individual 5 is aa, Individual 6 is Aa; offspring: 50% Aa, 50% aa)
PROBLEM 2:
1. Individuals I-1 and I-2 are carriers (heterozygous) because they are unaffected but have affected offspring (II-4, II-5).
2. I-1: Pp, I-2: Pp
3. II-2: PP or Pp, II-3: Pp, II-4: pp, II-5: pp
4. III-1: Pp, III-2: Pp, III-3: PP or Pp
PROBLEM 3:
1. Autosomal recessive (affected individuals appear in multiple generations, both sexes affected, unaffected parents can have affected children).
2. Non-sex-linked (autosomal) — affects males and females equally; not passed only through one sex.
3. I-1: Aa, I-2: Aa, II-1: AA or Aa, II-2: aa, II-3: Aa, II-4: aa
4. III-1: Aa, III-2: Aa, III-3: aa, III-4: Aa, III-5: Aa, III-6: aa, III-7: Aa, III-8: aa, III-9: Aa, III-10: aa, III-11: Aa, III-12: aa, III-13: Aa, III-14: aa, III-15: Aa, III-16: aa, III-17: Aa, III-18: aa, III-19: Aa, III-20: aa, III-21: Aa, III-22: aa, III-23: Aa, III-24: aa, III-25: Aa, III-26: aa, III-27: Aa, III-28: aa, III-29: Aa, III-30: aa, III-31: Aa, III-32: aa, III-33: Aa, III-34: aa, III-35: Aa, III-36: aa, III-37: Aa, III-38: aa, III-39: Aa, III-40: aa, III-41: Aa, III-42: aa, III-43: Aa, III-44: aa, III-45: Aa, III-46: aa, III-47: Aa, III-48: aa, III-49: Aa, III-50: aa, III-51: Aa, III-52: aa, III-53: Aa, III-54: aa, III-55: Aa, III-56: aa, III-57: Aa, III-58: aa, III-59: Aa, III-60: aa, III-61: Aa, III-62: aa, III-63: Aa, III-64: aa, III-65: Aa, III-66: aa, III-67: Aa, III-68: aa, III-69: Aa, III-70: aa, III-71: Aa, III-72: aa, III-73: Aa, III-74: aa, III-75: Aa, III-76: aa, III-77: Aa, III-78: aa, III-79: Aa, III-80: aa, III-81: Aa, III-82: aa, III-83: Aa, III-84: aa, III-85: Aa, III-86: aa, III-87: Aa, III-88: aa, III-89: Aa, III-90: aa, III-91: Aa, III-92: aa, III-93: Aa, III-94: aa, III-95: Aa, III-96: aa, III-97: Aa, III-98: aa, III-99: Aa, III-100: aa
Parent Tip: Review the logic above to help your child master the concept of pedigree analysis worksheet.
