Difference between revisions of "Sex Determination"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | '''Sex determination''' is how the | + | '''Sex determination''' is how the sex of a individual is decided by the [[chromosome]]s. |
===About Sex Determination=== | ===About Sex Determination=== | ||
| − | : In [[human]]s [[female]]s have two [[X Chromosome]]s while [[male]]s have an [[X Chromosome]] and a [[Y Chromosome]]. | + | : In [[human]]s; [[female]]s have two [[X Chromosome]]s while [[male]]s have an [[X Chromosome]] and a [[Y Chromosome]]. |
: The probability of a [[male]] or a [[female]] being [[conception|conceived]] is 50%. | : The probability of a [[male]] or a [[female]] being [[conception|conceived]] is 50%. | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| − | |[[File:PunnetSquareXXXY.png|center| | + | |[[File:PunnetSquareXXXY.png|center|400px]] |
|- | |- | ||
| style="height:20px; width:200px; text-align:center;" |This [[Punnett Square|punnett square]] shows the chances of having [[male]] or [[female]] [[offspring]]. | | style="height:20px; width:200px; text-align:center;" |This [[Punnett Square|punnett square]] shows the chances of having [[male]] or [[female]] [[offspring]]. | ||
|} | |} | ||
| + | |||
| + | ===References=== | ||
| + | ====AQA==== | ||
| + | |||
| + | :[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Sex determination, page 211, GCSE Biology; Third Edition, Oxford University Press, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Sex determination, pages 192-3, GCSE Biology, Hodder, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Sex determination, pages 40-1, GCSE Combined Science Trilogy 2, Hodder, AQA ''] | ||
| + | |||
| + | ====Edexcel==== | ||
| + | |||
| + | :[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Sex determination, page 39, GCSE Biology; The Revision Guide, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc-21&linkId=dedef775c6a43dbb0a609441525adac0 ''Sex determination, pages 111, 112, GCSE Biology, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Sex determination, pages 29, GCSE Combined Science; The Revision Guide, CGP, Edexcel ''] | ||
| + | |||
| + | ====OCR==== | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Sex determination, page 52, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR ''] | ||
Latest revision as of 10:46, 19 December 2019
Contents
Key Stage 4
Meaning
Sex determination is how the sex of a individual is decided by the chromosomes.
About Sex Determination
- In humans; females have two X Chromosomes while males have an X Chromosome and a Y Chromosome.
- The probability of a male or a female being conceived is 50%.
 |
| This punnett square shows the chances of having male or female offspring. |
References
AQA
- Sex determination, page 211, GCSE Biology; Third Edition, Oxford University Press, AQA
- Sex determination, pages 192-3, GCSE Biology, Hodder, AQA
- Sex determination, pages 40-1, GCSE Combined Science Trilogy 2, Hodder, AQA
Edexcel
- Sex determination, page 39, GCSE Biology; The Revision Guide, CGP, Edexcel
- Sex determination, pages 111, 112, GCSE Biology, CGP, Edexcel
- Sex determination, pages 29, GCSE Combined Science; The Revision Guide, CGP, Edexcel