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词汇 Double recessive
分类 英语词汇 英语翻译词典
释义

Double recessive

原声例句
CNN 10 学生英语 2023年5月合集

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

白灵熊实际上是黑熊的一个亚种，由于双隐性基因，白灵熊根本不是黑色的。

CNN 听力 2023年7月合集

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

灵熊实际上是黑熊的一个亚种。但由于双隐性基因，灵熊的毛发一点也不黑。

英语百科

Dominance (genetics)

Peas in pods
an autosomal dominant pattern.
an autosomal recessive pattern.
This Punnett square illustrates incomplete dominance. In this example, the red petal trait associated with the R allele recombines with the white petal trait of the r allele. The plant incompletely expresses the dominant trait (R) causing plants with the Rr genotype to express flowers with less red pigment resulting in pink flowers. The colors are not blended together, the dominant trait is just expressed less strongly.

This formula relies on a number of assumptions and an accurate estimate of the frequency of the recessive trait. In general, any real-world situation will deviate from these assumptions to some degree, introducing corresponding inaccuracies into the estimate. If the recessive trait is rare, then it will be hard to estimate its frequency accurately, as a very large sample size will be needed.
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