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ikadub [295]
3 years ago
6

Cystic fibrosis in humans is caused by recessive mutations in a single gene located in an autosome and follows mendelian laws. a

normal couple has two children. the first child has cystic fibrosis, and the second child is unaffected. what is the probability that the second child is a carrier (heterozygous) for the mutation that causes the disease? (hint: we already know that the second child is not homozygous recessive)
Biology
1 answer:
lara [203]3 years ago
4 0
I think the probability would be 50% bc there are four options FF Ff fF and ff. Half of those are heterozygous (the child would be a carrier). So I think it's 50%. However, if we already know that the child will not have the ff combination, then we could say that there are only three other options (so maybe it's 60%?) but that's probably just me being a smartass.
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Suppose that when you examined your tubes (in this exercise) after incubating them, you noticed that the unsealed control contai
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The Oxidation-Fermentation Test is used to differentiate bacteria built on their capability to oxidize or ferment specific sugars.
Once microbes are inoculated,-One tube is sealed with a layer of sterile mineral oil to promote anaerobic growth and fermentation.-The other tube is left unsealed to allow aerobic growth and oxidation.
Organisms able to ferment the carbohydrate or ferment and oxidize the carbohydrate will turn the sealed and unsealed yellow throughout.
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Fragile fermenters will convert both tubes slightly yellow at the top.
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Since Pair #1 showed complete yellowing for sealed and unsealed, these Organisms able to ferment the carbohydrate or ferment and oxidize the carbohydrate. So our interpretation will be that the organism has: Oxidation and fermentation OR fermentation only.
For tubes #2 and #3, the sealed tubes were green throughout suggests that they need oxygen for aerobic growth, and the fact that their unsealed tubes showed light yellowing is evidence for oxidation. Sealed - Green and Unseal - Yellow. Our interpretation for these pairs of tubes would be : Oxidation
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3 years ago
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Answer:

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The tendency of an animal to perform a specific behavior after getting exposed to the stimulus for the first time is known as instinct. It can be said that one cannot learn innate or instinct behavior. It is performed by all the species in a similar manner irrespective of the surroundings. Caring for offspring is one of the examples of innate behaviors performed by the species that even demonstrate the basic life functions. Innate behaviors play an essential role in transmitting or passing genes to the coming generations.  

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