Tsuas yog cov kwv tij uas yuav muaj cov txiaj ntsig DNA zoo ib yam yog cov menyuam ntxaib zoo ib yam. Cov menyuam ntxaib zoo ib yam yog qhov tshwj xeeb hauv lawv cov DNA los ntawm tib qhov kev sib txuas ntawm cov noob, tsis zoo li lwm cov nus muag. Txawm tias cov menyuam ntxaib kwv tij yuav tsis tas yuav tau txais cov txiaj ntsig zoo ib yam los ntawm kev kuaj DNA.
Puas yog DNA tib yam rau txhua tus neeg hauv tsev neeg?
Vim vim kev sib koom ua ke, cov kwv tij tsuas muaj kwv yees li 50 feem pua ntawm tib DNA, qhov nruab nrab, Dennis hais. Yog li thaum cov kwv tij txheeb ze muaj tib tsev neeg tsob ntoo, lawv cov noob caj noob ces tej zaum yuav txawv nyob rau hauv tsawg kawg yog ib qho ntawm cov chaw saib nyob rau hauv ib qho kev xeem. Qhov ntawd yeej muaj tseeb txawm yog kwv tij ntxaib.
2 tus neeg puas muaj DNA tib yam?
Qhov muaj peev xwm muaj DNA zais zais sib koom ntxaib yog qhov tsawg heev. Koj cov DNA tau npaj rau hauv chromosomes, uas tau muab faib ua 23 khub. … Txoj kev xav, cov kwv tij-poj niam txiv neej sib txawv tuaj yeem tsim nrog tib qho kev xaiv ntawm chromosomes, tab sis qhov txawv ntawm qhov tshwm sim no yuav yog ib tus hauv 246 lossis txog 70 trillion.
Yuav DNA npaum li cas rau cov txheeb ze sib txawv?
Nyob zoo cov kwv tij, niam txiv thiab me nyuam sib koom 50 feem pua ntawm lawv DNA nrog ib leeg. Thaum cov DNA sib koom ntawm cov kwv tij tag nrho suav nrog 25 feem pua ntawm leej niam DNA thiab 25 feem pua ntawm leej txiv DNA, DNA sib koom ntawm niam txiv thiab menyuam yog 50 feem pua ntawm niam txiv DNA.
cov kwv tij puas yuav muaj DNA tib yam?
Passing DNA
Thiabtxij li thaum koj niam koj txiv tau txais lawv cov DNA los ntawm lawv niam lawv txiv, koj kuj muaj qee qhov DNA los ntawm koj pog thiab yawg. Koj thiab ib tug kwv tij txheeb ze sib koom ib pawg niam tais yawm txiv ces koj kuj qhia qee yam ntawm lawv cov DNA. Yog vim li cas koj thiaj muaj kwv 12% ntawm tib DNA tib yam.
