Wednesday, December 18, 2013

BT YoungScientists 2014

Please have a look through the following slides describing our entries into the BT Young Scientist competition 2014. Well done to everyone who took part. A big congratulations to all on making it this far and best of luck in the final. A massive word of appreciation to Ms Higgins for all her hard work. Without her efforts none of this would be possible. Many thanks from students, staff and parents alike.

 










Tuesday, December 17, 2013

LC Biology Experiments - Heart Dissection

Hi folks. Please watch the clip below to revise your heart dissection.
Enjoy

Monday, December 9, 2013

LC Biology - Sex-Linked Genetics

More revision for Genetics on todays topics

Thursday, December 5, 2013

LC Biology - Dihybrid Crosses

Another 2 questions for tonight's homework

Question 1

The chestnut coat color of horses is due to a recessive gene, while the dominant
allele results in black. The pacing gait is due to a recessive gene, whereas the
dominant allele results in the trotting gait. Show the types of offspring that could
result from a cross of a black trotter (male), heterozygous for both genes, with a
chestnut pacer (female).

a. Possible genotypes for Black coat: ________ Chestnut coat: _______
b. Possible genotypes for Trotting gait: _________ Pacing gait: _________
c. Male genotype: _____________ Male possible gametes: _______________
d. Female genotype: ___________ Female possible gametes: ______________
e. Draw a punnet square
f. Genotypic Ratio:
g. Phenotypic Ratio:
h. What percentage of the offspring will exhibit both dominant traits? _______
i. What percentage of the offspring will be chestnut trotters? ______
j. What are the chances of having a chestnut horse that paces? __ in __

Question 2
(Remember co-dominace)

In shorthorn cattle, the polled condition is dominant over horned. Also, the
heterozygous condition (Rr) of red coat (R) and white coat (r) is roan, an example
of codominance. (The roan coat contains both red and white fur because neither
allele is dominant over the other). If a homozygous polled, white male is bred to a
horned, red female, what will be the appearance of the F1 generation?


a. Possible genotypes for Pulled condition: ________ Horned: _______
b. Possible genotypes for Red coat: _____ White Coat: _____ Roan Coat: _____
c. Male genotype: _____________ Male possible gametes: _______________
d. Female genotype: ___________ Female possible gametes: ______________
e. Draw a punnet square
f. Genotypic Ratio:
g. Phenotypic Ratio:
h. What percentage of the offspring will exhibit both dominant traits? _______
i. What percentage of the offspring will be roan? ______
j. What are the chances of having a horned, white cow? __ in __
k. If you bred two of the F1 generation, what percentage of the new offspring (F2
generation) will exhibit both dominant traits? _______
l. If you bred two of the F1 generation, what percentage of the new offspring (F2

generation) will be horned and have a roan coat? _______

Ag Science - Grassland Management

Please watch clip below to further explain Zero Grazing Hope it helps!

Wednesday, December 4, 2013

LC Biology - Movement through Membranes Mindmap

Hi folks, please use the following Mindmap to get you started on creating your own Mindmap on Movement through Membranes. You can watch the link from todays class and maybe even try it out at home.
Enjoy
Mr Gilmartin

LC Biology - Dihybrid Cross Problems

In grasshoppers, the body color of brown is dominant over green. Also, having
strong legs is dominant over having weak legs. A heterozygous brown, homozygous
strong-legged male meets a heterozygous brown, homozygous weak legged female.
They produce a number of offspring. Complete the following.

a. Possible genotypes for Brown body color: ________ Green body color: _______
b. Possible genotypes for Strong legs: _________ Weak legs: _________
c. Male genotype: _____________ Male possible gametes: _______________
d. Female genotype: ___________ Female possible gametes: ______________

e.Draw Punnet Square

f. Genotypic Ratio:
g. Phenotypic Ratio:
h. What percentage of the offspring will exhibit both dominant traits? _______
i. What percentage of the offspring will have a brown body and weak legs? ______
j. What are the chances of having a green grasshopper with strong legs? __ in __

Tuesday, December 3, 2013