Thaum fertilization, gametes los ntawm cov phev ua ke nrog gametes los ntawm lub qe los tsim ib lub zygote. Lub zygote muaj ob pawg ntawm 23 chromosomes, rau qhov xav tau 46.
Puas muaj pes tsawg chromosomes ib zygote muaj quizlet?
Tib neeg zygotes muaj 46 chromosomes. Hom kev faib cell uas tsim gametes nrog ib nrab ntawm tus lej chromosome yog hu ua meiosis.
Puas ib txwm tib neeg zygote muaj 46 chromosomes?
Yog li, zygote muaj 46 chromosomes, thiab thaum lub zygote nkag mus rau mitosis pib tsim lub embryo, txhua lub cell yuav muaj tus lej ntawm 46 chromosomes. Cells uas muaj ob daim ntawv luam ntawm txhua chromosome (i.e. cov hlwb uas muaj khub ntawm homologous chromosomes) hu ua diploid cells.
Puas muaj pes tsawg tus chromosomes puas muaj zygote?
Lub zygote sawv cev rau thawj theem ntawm kev loj hlob ntawm cov kab mob tshwj xeeb. Lub zygote tau txais txiaj ntsig nrog cov noob los ntawm ob niam txiv, thiab yog li nws yog diploid (nqa ob pawg chromosomes).
YYYA yog dab tsi?
Males nrog XYY syndrome muaj 47 chromosomes vim yog Y chromosome ntxiv. Cov mob no kuj qee zaum hu ua Jacob's syndrome, XYY karyotype, lossis YY syndrome. Raws li National Institutes of He alth, XYY syndrome tshwm sim hauv 1 ntawm txhua 1,000 tus tub.
