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Unit 2a Exam Questions MARKING SCHEME

Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

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Page 1: Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

Unit 2a Exam Questions MARKING SCHEME

Page 2: Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

Page 3: Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

5. a hormone X: FSH

Tissue Y: Interstitial cells

5. b. i. prostate (gland)

5. b. ii. They maintain the mobility / viability of the sperm

Or specific example: sugar / glucose / fructose provides energy for sperm

Prostaglandins stimulate contraction of female reproductive tract

/system/cervix/uterus

Enzymes keep semen/fluid that the sperm swim in at the correct

viscosity/thickness

Page 4: Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

Page 5: Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

5.a.

5.b.

5.c.

Page 6: Unit 2a Exam Questions MARKING SCHEME...xHY and X X / xhxH If (a)(i) incorrect do not penalise twice She can only get the allele from her mother is not sufficient. The only allele

(ignore the scribble – you can and should have done Q 4b.)

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