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SEX-LINKED and SEX INFLUENCED TRAITS

SEX-LINKED and SEX INFLUENCED TRAITS. SEX DETERMINATION. female. XX =. male. Xy =. X. X. Who decides ?. X X. X X. X. Mom can give X Dad can give X or y. X y. X y. y. Dads determine sex of babies.

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SEX-LINKED and SEX INFLUENCED TRAITS

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  1. SEX-LINKED and SEX INFLUENCEDTRAITS

  2. SEX DETERMINATION female XX = male Xy =

  3. X X Who decides? X X X X X Mom can give X Dad can give X or y X y X y y Dads determine sex of babies. If dad gives X with mom’s X = girl If dad give y with mom’s X = boy

  4. SEX CHROMOSOMES CAN CARRY OTHER GENES TOO= ___________________ SEX LINKED TRAITS

  5. SEX LINKED TRAITS show up in different % in males and females because they move with the sex chromosomes

  6. Sex chromosomes can carry other genes Y-LINKED GENES: Genes carried on Y chromosome EX:Hairy pinna Y linked males. _________genes only show up in _______

  7. Make a cross with a y-linked gene Hairy ears is a ________________ ________________ trait Y linked dominant H Use ______ for hairy ears. Use ______ for recessive normal ears. On y chromosome so write it as ________ h yH

  8. Make a cross with a y-linked gene X X ALL GIRLS = ____________ X X X X X Normal ears ALL BOYS = ____________ Hairy ears X yH yH X yH

  9. Sex chromosomes can carry other genes X-LINKED GENES: Genes carried on the X chromosome EX: _____________ _____________ _________________________ Hemophilia Colorblindness Duchenne Muscular Dystrophy

  10. Make a cross with an X-linked gene Hemophilia is an ________________ ________________ disease X-linked recessive H Use ______ for normal dominant blood clotting gene. Use ______ for recessive hemophilia gene. On X chromosome so write it as ________ h Xh

  11. H H H h CARRIER Mother Without hemophilia = X X Without hemophilia = X X With hemophilia = X X Father Without hemophilia = X y With hemophilia = X y h h H h

  12. Make a cross with an X-linked gene Carrier Mom X Normal dad GIRLS _______ = normal _______ = look normal but are CARRIERS BOYS _______ = normal _______ = hemophilia 1/2 XHXH XHy XHXh Xh y 1/2 1/2 1/2

  13. Make a cross with an X-linked gene Colorblindness is an ________________ ________________ disease X-linked recessive B Use ______ for normal dominant color gene Use ______ for recessive colorblind gene. On X chromosome so write it as ________ b Xb

  14. B B B b CARRIER Mother normal vision = X X normal vision = X X colorblind = X X Father normal vision = X y colorblind = X y b b B b

  15. Color blindness is sex linked HOMOZYGOUSNormal Mom X colorblind dad XBXbXBy XBXb XBy GIRLS = _______________ BOYS = ________________ 100% carriers 100% normal

  16. SEX LINKED TRAITS show up in different % in males and females because they move with the sex chromosomes

  17. Y linked genes ________ show up in males. X linked recessive genes appear __________ in males than females. Females can be __________ for X linked recessive traits. Males can _________ carriers for X linked recessive genes. The either have trait OR are normal. ONLY more often CARRIERS NEVER BE

  18. SEX INFLUENCED TRAITS not carried Genes ___________ on sex chromosomes BUT affected by ____________ of individual with gene sex hormones

  19. Male Pattern Baldness Autosomal dominant gene

  20. YOUR SEX CHANGES THE EXPRESSION OF THE GENE B is dominant for baldness B’ is recessive for not bald If you are MALE: If you are FEMALE: BB = BB= BB’ = BB’= B’B’ = B’B’= BALD BALD BALD NOT bald NOT bald NOT bald

  21. Will they be bald? Bald = B Autosomal Dominant gene XXBB’XyBB’ XXBB’ XyBB’ Bald dad X pure non bald mom Girls: 100% NOT BALD Boys: 100% BALD

  22. Will they be bald? Bald = B Autosomal Dominant gene XXBB’XyBB’ XXB’B’ XyB’B’ NOT BALD dad X NOT BALD mom (who had a bald dad) Girls: 100% NOT BALD Boys: 50% BALD 50% NOT BALD

  23. How are genes passed on over generations?

  24. PEDIGREE CHART Males = Females = Has trait = Carrier =

  25. SEX-LINKED and SEX INFLUENCEDTRAITS

  26. SEX DETERMINATION XX = ___________ Xy = _________

  27. X X Who decides? X Mom can give X Dad can give X or y y Dads determine sex of babies. If dad gives X with mom’s X = girl If dad give y with mom’s X = boy

  28. SEX CHROMOSOMES CAN CARRY OTHER GENES TOO= ___________________

  29. SEX LINKED TRAITS show up in different % in males and females because they move with the sex chromosomes

  30. Sex chromosomes can carry other genes Y-LINKED GENES: Genes carried on Y chromosome EX:Hairy pinna _________genes only show up in _______

  31. Make a cross with a y-linked gene Hairy ears is a ________________ ________________ trait Use ______ for hairy ears. Use ______ for recessive normal ears. On y chromosome so write it as ________

  32. Make a cross with a y-linked gene X X ALL GIRLS = ____________ X ALL BOYS = ____________ yH

  33. Sex chromosomes can carry other genes X-LINKED GENES: Genes carried on the X chromosome EX: _____________ _____________ _________________________

  34. Make a cross with an X-linked gene Hemophilia is an ________________ ________________ disease Use ______ for normal dominant blood clotting gene. Use ______ for recessive hemophilia gene. On X chromosome so write it as ________

  35. Mother Without hemophilia = X X Without hemophilia = X X With hemophilia = X X Father Without hemophilia = X y With hemophilia = X y

  36. Make a cross with an X-linked gene Carrier Mom X Normal dad GIRLS _______ = normal _______ = look normal but are CARRIERS BOYS _______ = normal _______ = hemophilia

  37. Make a cross with an X-linked gene Colorblindness is an ________________ ________________ disease Use ______ for normal dominant color gene Use ______ for recessive colorblind gene. On X chromosome so write it as ________

  38. Mother normal vision = X X normal vision = X X colorblind = X X Father normal vision = X y colorblind = X y

  39. Color blindness is sex linked HOMOZYGOUSNormal Mom X colorblind dad GIRLS = _______________ BOYS = ________________

  40. SEX LINKED TRAITS show up in different % in males and females because they move with the sex chromosomes

  41. Y linked genes ________ show up in males. X linked recessive genes appear __________ in males than females. Females can be __________ for X linked recessive traits. Males can _________ carriers for X linked recessive genes. The either have trait OR are normal.

  42. SEX INFLUENCED TRAITS not carried Genes ___________ on sex chromosomes BUT affected by ____________ of individual with gene sex hormones

  43. Male Pattern Baldness Autosomal dominant gene

  44. YOUR SEX CHANGES THE EXPRESSION OF THE GENE B is dominant for baldness B’ is recessive for not bald If you are MALE: If you are FEMALE: BB = BB= BB’ = BB’= B’B’ = B’B’=

  45. Will they be bald? Bald = B Autosomal Dominant gene Bald dad X pure non bald mom

  46. Will they be bald? Bald = B Autosomal Dominant gene NOT BALD dad X NOT BALD mom (who had a bald dad)

  47. How are genes passed on over generations?

  48. PEDIGREE CHART Males = Females = Has trait = Carrier =

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