Quiz — Série N°5 Sans Correction - Génétique Humaine - Lycée ibn Rachik Sfax - Bac Science.pdf

Question 1 sur 10 20:00

[{"id":10953,"question":"Quel est le génotype d'un individu atteint d'une maladie autosomique récessive ?","option_a":"AA","option_b":"Aa","option_c":"aa","option_d":"XaY","option_e":"","option_f":"","bonne_reponse":"c","explication":"Une maladie autosomique récessive s'exprime uniquement si l'individu est homozygote récessif (aa).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"AA\", \"b\": \"Aa\", \"c\": \"aa\", \"d\": \"XaY\"}}","_debug_options_count":4},{"id":10954,"question":"La mucoviscidose est une maladie génétique causée par une mutation sur le chromosome 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La mucoviscidose est bien causée par une mutation sur le chromosome 7, confirmant son caractère autosomique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":10955,"question":"Dans un croisement dihybride entre deux individus hétérozygotes (AaBb x AaBb), quelle est la proportion de descendants présentant les deux caractères dominants ?","option_a":"1\/16","option_b":"9\/16","option_c":"3\/16","option_d":"12\/16","option_e":"","option_f":"","bonne_reponse":"b","explication":"La proportion est de 9\/16 selon la loi de Mendel pour un dihybridisme (9 A_B_, 3 A_bb, 3 aaB_, 1 aabb).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"1\/16\", \"b\": \"9\/16\", \"c\": \"3\/16\", \"d\": \"12\/16\"}}","_debug_options_count":4},{"id":10956,"question":"L'hémophilie est une maladie liée au chromosome X. Un homme hémophile transmet-il la maladie à ses fils ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Non, car l'homme transmet son chromosome Y à ses fils. La maladie est transmise aux filles (porteuses) mais pas aux fils.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":10957,"question":"Quel est le caryotype d'une personne atteinte du syndrome de Down ?","option_a":"46,XX","option_b":"47,XX,+21","option_c":"45,X","option_d":"46,XY,del(5p)","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le syndrome de Down est causé par une trisomie du chromosome 21 (47,XX,+21 ou 47,XY,+21).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"46,XX\", \"b\": \"47,XX,+21\", \"c\": \"45,X\", \"d\": \"46,XY,del(5p)\"}}","_debug_options_count":4},{"id":10958,"question":"La drépanocytose est une maladie autosomique dominante.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux, la drépanocytose est une maladie autosomique récessive (les hétérozygotes sont porteurs sains).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":10959,"question":"Dans un arbre généalogique, si deux parents non atteints ont un enfant atteint, quel est le mode de transmission probable de la maladie ?","option_a":"Autosomique dominant","option_b":"Autosomique récessif","option_c":"Lié au chromosome X","option_d":"Lié au chromosome Y","option_e":"","option_f":"","bonne_reponse":"b","explication":"Si les parents ne sont pas atteints mais ont un enfant malade, la maladie est probablement autosomique récessive.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Autosomique dominant\", \"b\": \"Autosomique récessif\", \"c\": \"Lié a","_debug_options_count":4},{"id":10960,"question":"Quel est le rôle de la PCR en génétique humaine ?","option_a":"Séquencer l'ADN","option_b":"Amplifier des fragments d'ADN","option_c":"Colorer les chromosomes","option_d":"Détecter les protéines","option_e":"","option_f":"","bonne_reponse":"b","explication":"La PCR (Polymerase Chain Reaction) permet d'amplifier des fragments d'ADN pour les analyser.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Séquencer l'ADN\", \"b\": \"Amplifier des fragments d'ADN\", \"c\": \"Co","_debug_options_count":4},{"id":10961,"question":"Un individu de génotype XhX (h = allèle récessif de l'hémophilie) est-il malade ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Non, car l'allèle h est récessif. L'individu est porteuse saine (XhX).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":10962,"question":"Quelle est la probabilité qu'un couple de porteurs sains (Aa x Aa) ait un enfant malade (aa) ?","option_a":"1\/4","option_b":"1\/2","option_c":"3\/4","option_d":"1","option_e":"","option_f":"","bonne_reponse":"a","explication":"La probabilité est de 1\/4 (25%) pour chaque enfant, car le croisement Aa x Aa donne 1 AA : 2 Aa : 1 aa.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"1\/4\", \"b\": \"1\/2\", \"c\": \"3\/4\", \"d\": \"1\"}}","_debug_options_count":4}]