The chance of them having the same recessive gene is low.

他们拥有相同基因几率很低。

Spirit bears are actually a subspecies of black bear that due to double recessive gene aren't black at all.

白实际上是黑一个亚种，由于双基因，白根本不是黑色。

Spirit bears are actually a subspecies of black bear that due to double recessive gene aren't black at all.

实际上是黑一个亚种。但由于双基因，毛发一点也不黑。

A theory might invoke dominant and recessive genes to explain how brown-haired parents ended up with a red-headed child, or use gravity to shed light on the parabolic trajectory of a baseball.

一个理论可能会引入显基因来解释为什么棕色头发父母 会生出红色头发小孩，或者运用重力来阐释棒球抛物线轨迹。

So, we know if you have offspring with someone genetically close to you like a sister or a cousin, it might mean that the child inherits two recessive genes.

所以， 我们知道， 如果您后代与遗传上与您亲近人（ 如姐妹或表亲）生育， 这可能意味着该孩子遗传了两个基因。

Experts still aren't sure exactly why it happens, but they believe four-leaf clovers are likely a result of either a rare recessive gene, or genetic mutations in the DNA of a clover plant.

专家们仍然不确定为什么会发生这种情况，但他们认为四叶草可能是一种罕见基因或三叶草植物 DNA 基因突变结果。

In fact, even when both parents carry a recessive gene, there's still a 75% chance that they won't both pass on the gene, leading to perfectly healthy kids with respect to that particular disorder or disease.

事实上，即使父母双方都携带有基因，他们也有75%几率不会同时将该基因遗传给下一代，从而使孩子们在有几率患上某种疾病或失调同时保持完全健康。