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MENDELS LAW OF GENETICS RELATING TO THOROUGHBREDS

Mendel’s  law of Genetics states there will always be a dominant and a recessive gene with same matings,and there is no way of knowing which mating will bring through the dominant gene.

Bonecrusher was a champion, winner of 9 group ones, including the famous Cox plate but he had 3 other full brothers Superbrat (unraced), Knucklebones ( 8 wins) and Counterfeit (4 wins) These 3 were not up to his level of performance. He was the second mating of Pag Asa over Imitation.

I suggest that once you have decided on a mating, it should be done until you get two of the same sex that you are trying for and only one may have the recessive genes.                                                                                                                                                                                                         

MENDELS SECOND LAW

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Three observations led Mendel to his second important proposal. Firstly, Mendel had observed that both the egg and sperm carry factors to the offspring. Secondly, he had shown that one trait dominates in the initial cross of mixed hybrids(for example, round peas in the F1 generation). Lastly, he had observed a trait that recedes into the background in the F1 generation reappears one-fourth of the time in the F2 generation. Working over the mathematics, Mendel realized that both parents carry two copies of each factor and that each parent must donate one copy to the offspring through their egg or sperm cell. Since all of the offspring in the first cross (F1) carry one factor that dominates (round peas) and one factor that recedes (wrinkled), they all have round peas. However, their offspring (F2) could inherit either a round or wrinkled factor from each the egg and sperm. Only those F2 plants that inherit a wrinkled factor from both the egg and sperm had wrinkled peas – exactly a one-fourth ratio. Thus Mendel concluded that two factors must be involved in producing a physical trait; however, only one factor is passed on from parent to offspring in the sperm or egg cell. At the time Mendel could not explain how the pairs separated into the gametes, or how they rejoined during pollination, but he was correct in thinking that the factors randomly and independently segregated into the plant's gametes.

My way of explaining Mendel's second law, with four matings resulting in the same sex, there will always be a Dominant foal, which will be the best racehorse and a Recessive one will be a non-winner, the other two Variable foals can be nearly as good as the Dominant one or nearly as bad as the recessive one, or have the racing abilities of somewhere in between.

DANEHILL AND HIS SIBLINGS TO SHOW HOW MENDEL"S LAW WORKS.                                                                             

                                      

DANEHILL (USA)	H	1986	DANZIG	HIS MAJESTY	9-4	$321,065
EAGLE EYED (USA)	H	1991	DANZIG	HIS MAJESTY	17-4	$355,818
ANZIYAN (USA)	H	1993	DANZIG	HIS MAJESTY	12-2	$76,905
HARPIA (USA)	M	1994	DANZIG	HIS MAJESTY	13-5	$294,389
NUCLEAR FREEZE (USA)	H	1996	DANZIG	HIS MAJESTY	3-1	$8,220
SHIBBOLETH (USA)	H	1997	DANZIG	HIS MAJESTY	12-5	$187,319
QUICK TO PLEASE2 (USA)	M	1998	DANZIG	HIS MAJESTY	5-1	$25,351
FAMILY12 (USA)	M	1999	DANZIG	HIS MAJESTY		Unraced
RAZZLE3 (USA)	M	2002	DANZIG	HIS MAJESTY		Unraced

                                                                                             

Danehill  1986 a G1 and G3 winner, 2008 live foals, for 89 G1 winners, champion stallion of all time since group races were introduced. Stood in Ireland and Australia plus Japan in 1996
Eagle Eyed 1991 a G2 winner, 993 live foals for 2 group winners, Peeping Tom a G1 and a G3, Popular Demand G1 and Googles a G2 winner, Stood in the USA and Australia for $10K and then sold to Turkey in 2000.
Anziyan  1993 a G3 placegetter twice, had 448 live foals, for 1 G3 winner, Ring of Fire He shows up once in a 4 generation pedigrees in Exstreme, by Ekraar She has Nearctic 5M x 5S and War Admiral 5F x 6F. He stood in New Zealand with an FOA in 1999, then in 2000 for $7,000 reducing to $5,000 in 2003 then sent back to USA in 2004.
Nuclear Freeze 1996 a 3Yo maiden winner, had 467 live foals for 2x G3 winners Nuclear Medicine and Nuclear Sky he stood in Australia, with a fee of $8K, reducing to $3.3K, and then exported to China in 2011. He doesn’t show up in any group winner’s pedigree.
Shibboleth 1997 a G3 winner, was getting ready for Stud duty but died as a 5-year-old before he could take up his duties.
This mating of Danzig x Razyana was carried out 9 times, producing the above 5 colts and the below fillies, 
 Harpia, G3 and 4 times G2 placed
 Quick to Please, won a maiden
 Razzle, was unraced
 Family, was also unraced, she is the only sister to show up anywhere in a 4 generation pedigree, being the dam of Dundonnell 6M x 6F to Olympia, A 2010 gelding G2 and G3 winner.

Analyzing all the above Harpia was her first filly foal on the Danzig cross and best filly but produced nothing of note, Danehill was the first  foal a G1 winner and champion sire, she then had 2 more foals, one to El Gran Senor then The Minstrel before returning to Danzig to produce the G2 winner Eagle Eyed, then the others as listed.

Does this show how Mendel’s law comes in to play? I believe it does, that’s why I say you have to view all the 7 generation pedigree of a mating and only double up the top horses in the pedigree or you will bring through recessive or inferior genes. 

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