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Example punnet square for sex-linked recessive trait | High school biology | Khan Academy

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Example punnet square for sex-linked recessive trait.
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Опубликовано:

5 сен 2024

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Комментарии : 62

@CopperLegend1 Год назад

Thank you so much!!! My teacher makes things super murky and unclear with his 20 side tangents, had no clue it was this easy!

@JohnSpeas-xr3dc 9 месяцев назад

This makes the test I have to take tomorrow feel like a walk on the park. THANK YOU!!🙏🏿

@priyashanker3608 6 лет назад

Yess it was a lot useful!! Thanks for this good explanation...🤗

@karimebeid6941 5 лет назад

i bet everyone watching has a test the next day and don't understand anything

@daniellekoogle4328 4 года назад

karim Ebeid I have a test today🤣

@amandamoskal3640 4 года назад

no haha i’m doing my online school and idk what i’m doing

@druroojzafar 3 года назад

HAHAHA I have a test tom

@girlwhoislearningrussian Год назад

that's not me and I don't have a test 😅😅 im just revising

@kimsun-woo9266 Год назад

fax

@dariyahussainshaik382 11 месяцев назад

THANKS FOR MAKING IT SO SIMPLE TO UNDERSTAND

@jasarenoashleyvignem.3749 10 месяцев назад

IN GOD NAME I WILL PERFECT MY THIRD EXAMINATION🎉🎉🎉

@touhidtouhid8588 6 лет назад

i studied it in my zoology book. i'm from Bangladesh.

@ayeshaarslan1381 10 месяцев назад

thank u that was so helpful as a college student where teachers expect u to know this stuff w/o explaining it. Appreciate it!!

@aboutstudies123 6 лет назад

Thank you Sir. It is very helpful. I have a query, at 4:13 it should be "50% chance for having non-Hemophiliac son"? Please clarify

@phillipwg9925 5 лет назад

Yes it should be 50%, given that they have a son. Sounds like a small oversight. Have to be careful, it depends on how the question is asked- given that they have a son OR given from all offspring (daughter & sons) Later @ 4:32 they ask about given that they have a son- what is chance they don't have hemo.? It's 50% - so non hemo is 50% as well.

@CosmoH0103 4 года назад

About Studies the chance of having a son with haemophilia is 25% as a whole (because it is also including the probability of having a daughter). If it asked what would be the chance that any son they had inherited haemophilia, then it would be 50%.

@alexlu8178 6 месяцев назад

agree with you, I am also confusing until I saw your comment

@amandamoskal3640 4 года назад

thank you

@rohanvikani9390 4 месяца назад

Thank you I understand now

@MillyCan Год назад

Very good explanation! I was able to understand it! Thank You!

@helvindapewa2803 10 месяцев назад

Very helpful I was busy sunrising for biology

@AndweleHarris 3 года назад

Well explained!!

@girlwhoislearningrussian Год назад

Amazing explanation, thank you good sir.

@Alexandra-fr1rz 2 года назад

So well explained!!!

@minnie4973 3 года назад

25% I am so confused? for the daughter he said 50% because there is only two possible ways to get but why for male is 25%?

@elitegaming4262 3 года назад

its out of all offspring possibilities

@AnishaKotakonda17 2 года назад

The question is asking about daughter . So ignore the male part . So 2 daughter = 2:2 . 1 daughter =1:2 which is 50 percent

@brendanguhle5761 2 года назад

Ahhh. “If they have a daughter (50 %) what are the chances she will have hemophilia” 1/2 Compared to What are the chances they will have a hemophiliac son. (25% out of total) 1/4. Tricky wording

@nasreen6814 2 года назад

the chance of having a son with haemophilia is 25% as a whole (because it is also including the probability of having a daughter). If it asked what would be the chance that any son they had inherited haemophilia, then it would be 50%. ctto

@rajhandreymontillana9848 3 года назад

sir, how about writing the genotypic and phenotypic ratio of that offspring using the problem you used in this video? please help me, I'm so confused about writing it. I'm confused whether writing the genotypic and phenotypic ratio is to write is based on gender or writing it as whole. Hope you help me with this concern. Thanks

@mmiikkaylla 3 года назад

it depends what the question is asking

@Mark-zd9ml 6 лет назад

Wow thanks for the help :)

@yourfutureself4327 3 года назад

Very positive comment aborted_ fish d!ck.

@user-vb2wt7es5c 3 года назад

Thanks

@chelsey8804 2 года назад

you had reported that it was a 50% chance of having hemophilia as a daughter, but the Hh for the daughter is heterozygous non disorder/ only carrier.. So she doesn't actually have it. Her children could. That being said the percentage to answer the question the way its worded, "Percentage that she will HAVE hemophilia", that is actually only 1:4. Because for recessive disorders you have to have both recessive allele's to have the disorder. similarly, in the x-linked recessive case, the girls have the second X chromosome that work as a back up so to say. She wouldn't actually have the disease.

@girlwhoislearningrussian Год назад

The question said IF they had a DAUGHTER. Out of the FOUR scenarios there are two. Two daughters only. We disregard the other two scenarios because they have a Y chromosome which makes them male. So OF the TWO scenarios we have - X(H)X(h) and X(h)X(h) only ONE of them will have haemophilia. The second one will. Because she has two Xh chromosomes. The first one will only be a carrier.

@abdulbasitimam5820 6 лет назад

its vary good but i am engineering student so

@arnavherwadkar8603 2 года назад

so?

@nasreen6814 2 года назад

@forks_lala 11 месяцев назад

Hey can I ask? Does this also apply to Color Blindness? (c = colorblind, C = Normal)

@hemanginishah4027 8 месяцев назад

Yes it does

@jodi-anngregg1485 4 года назад

Who is phenotypically normal?

@nathanparrish4342 2 года назад

The individuals who do not have hemophilia. Even if they are a carrier, they are still phenotypically normal because it is not expressed in their phenotype

@riefkaannisaprilyta6781 4 года назад

Why 25% ? Help

@ankurmandal4792 3 года назад

(1/4)*100=25

@mmiikkaylla 3 года назад

because it's out of all offspring, not just the sons

@jasonn600 Год назад

My bacon is saved. Gonna load it now.

@cybelaybarzabal1886 3 года назад

hi can i ask... what if its animals? Lets say male birds are ZZ and female birds are ZW. And barred feathers are (ZB) while non-barred feathers(Zb)... then if ill make a punnett square between barred female and a non barred male chicken, how do i cross them? Hope you'll notice...

@mmiikkaylla 3 года назад

I think you're looking to far into it. If the birds are still female and male, females would still be XX and males would still by XY. This does not change since it's specifically sex-linked traits

@not.arhaan9274 3 года назад

epic

@RunningRicky78 3 года назад

Can you do this one “A family that lives in Kentucky has a rare genetic disorder; some of the family members have blue skin. Normal skin color (N) is dominant to blue skin (n) color. A woman and man who have normal skin color produce a child with blue skin.”