The family that plays sports together heads to the Olympics together -- or so it seems from this year's batch of Olympians who come from the same gene pool, or at the very least, the same household.
Competing family members are nothing new at the Olympics -- the Williams sisters, both of whom won't be playing tennis this year, are the first ones who come to mind -- but it's no less exciting to see how shared DNA can truly work in a family's favour.
Swimming particularly seems to inspire a healthy hereditary competitive spirit, with 11 sibling duos hitting the pool this year.
And not surprisingly, many of the athletes competing have parents who once participated in the Olympics, or at the very least, at a high competitive level. This combination of growing up in an environment which values athletic ability, along with parents who are experts (like Andy and Jamie Murray's mom, a former professional tennis coach) could create the perfect breeding ground for Olympians.
SEE: Take a look at some of the family members, couples included, who will be taking part in this year's Olympic Games in London, and gawk at their gene pools:
Jim And Heather Steacy
Siblings Jim and Heather Steacy from Saskatchewan will both be participating in the Olympics in the hammer throw -- their university, the University of Lethbridge -- created this beautiful sendoff.
Jason And David Dunford
Jason, 25, and younger brother David, 23, both swim for Kenya. They were first swimmers from that country to qualify for the Olympic Games.
Ashton Eaton And Brianne Theisen
Cross-border engaged couple Ashton Eaton and Brianne Theisen hopefully don't let their nationalities get in the way of their relationship. Eaton, an American, competes as a decathlete, while Theisen, a Canadian, is a heptathlete (shown with Eaton's mother, Roslyn, on left). The pair met at the University of Oregon, where they train.
Bob And Mike Bryan
Tennis-playing twins Bob (left) and Mike Bryan hold the record for the longest time at World No. 1 for doubles for the United States, and have a tendency to bump chests when they win. In their younger days, their parents forbid them from playing each other in tournaments.
Tingting And Wenwen Jiang
These identical twins from China don't only have awesome names -- they're also synchronized swimmers, who, we imagine, have a huge advantage over the rest of the athletes with that twin ESP thing.
Michael And Lauren Wilkinson
Canadian rowers Michael and Lauren Wilkinson are walking in their father's footsteps -- David Wilkinson was meant to participate in the 1980 Olympics until the boycott was established. Now the siblings are taking on their own roles.
Maggie And Jessica Steffens
Like so many of these family affairs, sisters Maggie and Jessica got into water polo (they play on the championship American team) thanks to their dad Carlos, who played the sport in his younger days (their uncles and cousins play too). As ESPN reports, "<a href="http://espn.go.com/espnw/news-opinion/6769208/for-steffens-water-polo-family-affair" target="_hplink">While raising his children, Carlos would use water polo metaphors to explain everyday situations, like driving lessons or playing dominos with the family</a>."
Yusuke, Rie and Kazuhito Tanaka
Yes, that's not two, but three siblings who will be heading to the Olympics together. Yusuke, the youngest, and Kazuhito, the oldest, along with sister Rie all qualified for the Japanese gymnastics team this year.
Cate And Bronte Campbell
Sisters Cate and Bronte Campbell of Australia are shown here celebrating finishing first and second in the Final of the Women's 50 Metre Freestyle during day eight of the Australian Olympic Swimming Trials, marking their path to the Olympics.
Zach And Paige Railey
These siblings from Florida look like a Ralph Lauren ad, so it should come as no surprise that they're sailors for the U.S. team, and both incredible excited about participating in the Olympics together for the first time. <a href="http://msn.foxsports.com/olympics/sailing/story/zach-railey-paige-railey-sailing-siblings-florida-london-family-gold-medal-contenders-finn-class-laser-radial-class-071712" target="_hplink">"We've always been a key support system for one another, so to go to the Olympics together is one of the best things in the world,'' Paige told Fox Sports.</a>
Laure And Florent Manaudou
French swimmers and siblings Laure and Florent Manaudou are going to the Olympics together for the first time -- Laure won gold in 2004, but had a disappointing finish in Beijing -- she announced her retirement and had a child with fellow French swimmer Frédérick Bousquet in 2010. After qualifying -- and particularly after her younger qualified too, we imagine it was hard to resist going back.
Andy And Jamie Murray
Andy Murray is most certainly a famous name among British athletes, but his older brother Jamie is making waves in his own right (he's the top-rated doubles player in Britain). The brothers will be playing together at the Olympics, and <a href="http://blogs.bettor.com/Jamie-Murray-says-he-can-help-Andy-Murray-in-forgetting-the-sorrow-of-Wimbledon-Tennis-News-a174635" target="_hplink">Jamie recently said in an interview, "We will shoot for a gold medal, we don't want to lose so we may as well win it."</a>
Ross And Grant James
Twin brothers Ross and Grant James will not only be rowing for the U.S. Olympic team together -- Ross got the final spot on the squad -- they'll also be sitting next to each other as they row.
Peter And Pavol Hochschorner
Slovakian twins Peter and Pavol Hochschorner are the twins to beat - these slalom canoers have won gold in 2000, 2004 and 2008.
Christope And Steeve Guenot
Steeve Guenet (second from the right) won gold for France in wrestling in the 66kg division in 2008, and has high hopes for this Olympics -- meanwhile, his brother Christophe (second from left) won bronze in the 74 kg division. They're shown here with their coaches (and medals).
Steven, Diana, Mark And Jean Lopez
With a record five world taekwondo championships and two Olympic gold medals for the U.S., Steven Lopez is the sport's biggest star. And at the London Games, he hopes to reclaim the gold he lost in Beijing as part of a family team: older brother Jean is his coach and sister Diana is also competing. Younger brother Mark didn't make the Olympic team this time, but is coming as a training partner.
Shaune And Brett Fraser
There's something about siblings and swimming, for sure. Cayman Island's Shaune Fraser, left, and brother Brett carried the flag at the 2008 Summer Olympics, and will be competing again this year.
Shinichi And Kenichi Yumoto
Shinichi (left) and twin brother Kenichi Yumoto take part in the training session for the Japan Men's wrestling team for the London 2012 Olympic Games at the National Training Center on May 24, 2012 in Tokyo, Japan.
Mona And Zain Shaito
They're American-born, and Zain once dreamed of being a hockey player, but that won't stop these siblings from fencing for Lebanon in the Olympics this year. They qualified for the country thanks to their Lebanese-born father.
Jill And Tom Boon
Belgian siblings Jill and Tom Boon both play field hockey, both at the Olympics for the first time this year.
Matt And Katy Emmons
They now live in Colorado, but husband-and-wife Matt and Katy Emmons shoot for different countries. Katy, from the Czech Republic, <a href="http://www.usatoday.com/sports/olympics/london/shooting/story/2012-07-25/shooting-Matt-Emmons-USA/56485684/1" target="_hplink">met her American husband at the 2004 Olympics</a>, when she gave him a good luck charm after he accidentally shot at the wrong target, costing him the gold.
Darcy Marquardt And Richard Hortness
She's a rower, he's a swimmer, and this Canadian couple could be our favourite love story the Olympics every told. They fell in love in Beijing -- <a href="http://www.thestar.com/sports/london2012/rowing/article/1203677--london-2012-canadian-olympians-who-fell-in-love-at-beijing-will-pursue-medals-in-london" target="_hplink">really, really sweetly</a> -- and now live together in London, Ontario.
Haley And Alyssa Anderson
These swimming sisters from the U.S. both swim freestyle, and at times, it can create conflict. When Haley almost beat her sister's 500-yard freestyle record at their high school (but didn't), Alyssa "did not know whether to be sad or glad. <a href="http://www.nytimes.com/2009/08/02/sports/02siblings.html?pagewanted=all" target="_hplink">'It was kind of an internal conflict,'" she told The New York Times.</a>
Lauryn And Russell Mark
This Australian couple -- both of whom are shooters -- recently made headlines for <a href="http://www.news.com.au/sport/london-olympics/russell-mark-fuming-after-told-he-and-wife-lauryn-cant-room-together-at-london-olympics/story-fndpu6dv-1226426647320" target="_hplink">the refusal by the Olympics to allow them to share a room</a>.
Hugues And Émilie Fournel
Canadian sibling duo Hugues and Émilie are both kayakers -- Hugues in the K-2 1000 m, and Émilie in the K-1 200m. Even better? Their father, Jean, competed in sprint canoe at the 1976 Summer Olympics in Montreal.
Pau And Marc Gasol
The NBA-playing Gasol brothers -- Pau plays for the Lakers, while Marc plays for the Grizzlies -- will be shooting hoops for their native Spain during the Olympics.
Katie And Julia Reinprecht
This will be both sisters' first Olympics as they play for the U.S.'s field hockey team. Julia, 20, is the youngest member of the team, while Julia, 22, had to delay her graduation from Princeton by one year due to training.
Sinead And Colin Russell
Sinead swims medley and Colin swims freestyle, so these Canadian siblings likely spent a whole lot of their childhood in the water. Sinead recently set a national record for her time in the Olympic trials.
Scott And Martin Sinclair
Scott's a football player with Swansea and will be playing on Great Britain's football team in the Olympics, while Martin, who was diagnosed with cerebral palsy, will be playing on Team GB for the Paralympics.
Annette And Alexander Edmondson
The first brother-sister pair to represent Australia in cycling, Annette and Alexander aren't afraid to use sibling rivalry to their advantage. <a href="http://london2012.olympics.com.au/news/siblings-on-brink-of-olympic-history-aoc-feature" target="_hplink">"As competitive siblings we've always wanted to outdo each other and we use that to our advantage," Annette said in an interview.</a>
Heather And Brittany MacLean
Heather, right, and Brittany MacLean, members of the 2012 Canadian Olympic Swimming Team pose for a photograph in Montreal, Monday, April 2, 2012.
Alistair And Jonathan Brownlee
These British brothers are tapped as<a href="http://www.telegraph.co.uk/sport/olympics/triathlon/9411439/London-2012-Olympics-Alistair-and-Jonathan-Brownlee-interview.html" target="_hplink"> possible one-two finishers in the triathalon at the Olympics</a>, giving their current standings as numbers one (Alistair, left) and two (Jonathan) in the world.