Quiz — Correction-série5-Top-Reproduction.pdf

Question 1 sur 10 20:00

[{"id":29020,"question":"Quel type de division cellulaire permet la formation des gamètes ?","option_a":"Mitose","option_b":"Méiose","option_c":"Fission binaire","option_d":"Scissiparité","option_e":"","option_f":"","bonne_reponse":"b","explication":"La méiose est la division cellulaire qui réduit de moitié le nombre de chromosomes pour former des gamètes haploïdes (spermatozoïdes et ovules).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Mitose\", \"b\": \"Méiose\", \"c\": \"Fission binaire\", \"d\": \"Scissipari","_debug_options_count":4},{"id":29021,"question":"Vrai ou Faux ? La fécondation est un processus qui permet la formation d'une cellule diploïde à partir de deux gamètes haploïdes.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La fécondation est bien la fusion de deux gamètes haploïdes (n chromosomes) pour former une cellule diploïde (2n chromosomes), l'œuf ou zygote.","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":29022,"question":"Quel est le nombre de chromosomes dans une cellule humaine après la fécondation ?","option_a":"23","option_b":"46","option_c":"22","option_d":"92","option_e":"","option_f":"","bonne_reponse":"b","explication":"Après la fécondation, la cellule œuf (zygote) possède 46 chromosomes, soit 23 paires (2n), car chaque gamète apporte 23 chromosomes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"23\", \"b\": \"46\", \"c\": \"22\", \"d\": \"92\"}}","_debug_options_count":4},{"id":29023,"question":"Vrai ou Faux ? Les caractères héréditaires sont toujours transmis selon les lois de Mendel.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Certains caractères héréditaires ne suivent pas les lois de Mendel (ex : caractères liés au sexe, caractères polygènes).","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":29024,"question":"Quel est le génotype possible d'un individu homozygote pour un caractère dominant ?","option_a":"AA","option_b":"Aa","option_c":"aa","option_d":"AB","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un individu homozygote pour un caractère dominant possède deux allèles identiques dominants (ex : 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\": \"AA\", \"b\": \"Aa\", \"c\": \"aa\", \"d\": \"AB\"}}","_debug_options_count":4},{"id":29025,"question":"Vrai ou Faux ? La trisomie 21 est causée par une non-disjonction des chromosomes lors de la mitose.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La trisomie 21 (syndrome de Down) est due à une non-disjonction des chromosomes lors de la méiose, pas de la mitose.","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":29026,"question":"Quel est le phénotype d'un individu de génotype Aa pour un caractère dominant ?","option_a":"Le caractère récessif","option_b":"Le caractère dominant","option_c":"Un mélange des deux","option_d":"Aucun des deux","option_e":"","option_f":"","bonne_reponse":"b","explication":"Pour un caractère dominant, le phénotype exprimé est celui de l'allèle dominant, même si l'individu est hétérozygote (Aa).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Le caractère récessif\", \"b\": \"Le caractère dominant\", \"c\": \"Un","_debug_options_count":4},{"id":29027,"question":"Vrai ou Faux ? Les crossing-over se produisent lors de la mitose.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Les crossing-over (échanges de segments entre chromosomes homologues) se produisent lors de la prophase I de la méiose, pas lors de la mitose.","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":29028,"question":"Quel est le résultat d'un croisement entre deux individus hétérozygotes (Aa x Aa) pour un caractère dominant ?","option_a":"100% AA","option_b":"75% A_, 25% aa","option_c":"50% Aa, 50% aa","option_d":"25% AA, 50% Aa, 25% aa","option_e":"","option_f":"","bonne_reponse":"d","explication":"Le croisement Aa x Aa donne une descendance avec 25% AA, 50% Aa et 25% aa (loi de Mendel).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"d\", \"options\": {\"a\": \"100% AA\", \"b\": \"75% A_, 25% aa\", \"c\": \"50% Aa, 50% aa\", \"d\": \"25%","_debug_options_count":4},{"id":29029,"question":"Vrai ou Faux ? L'ADN est présent uniquement dans le noyau des cellules eucaryotes.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'ADN est principalement dans le noyau, mais aussi dans les mitochondries (ADN mitochondrial) et les chloroplastes (chez les végétaux).","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}]