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Law Incorporation [45]
1 year ago
11

Butterflies can produce hundreds of offspring per cross. In a certain variety of butterflies, a maternally-imprintable gene is r

esponsible for wing phenotype. Two possible alleles for this gene are w for normal wings and wc for crinkled wings. Which of the following pieces of information would be helpful in predicting the wing phenotype of a male offspring from a cross?
a. look at the father's phenotype
b. know the mother's genotype
c. look at the mother's phenotype
d. know the father's genotype
Biology
1 answer:
amm18121 year ago
5 0

Answer: d. know the father's genotype

Explanation: Butterflies can produce hundreds of offspring per cross. In a certain variety of butterflies, a maternally-imprintable gene is responsible for wing phenotype.

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Suppose that Gene B occurs in a sea turtle gene pool where the frequency of the B1 allele is 0.5 and the frequency of the B2 all
disa [49]

Answer:

Frequency of the B3 allele = 0.1

Explanation:

The allele frequencies in a given population remain constant which means that every generation will have the same gene pool across the generations. As per Hardy Weinberg’s first equilibrium equation, the sum of frequency of all the alleles at a given locus is equal to one  

Thus, if "p" represents the frequency of B1 allele and "q" represents the frequency of B2 allele and "r" represents the allele for B3 allele. Then, sum or "p", "q" and "r" is equal to one.

p+q+r = 1\\

Substituting the given values, we get -

0.5 + 0.4 + r = 1\\0.9 + r = 1\\r = 1-0.9\\r = 0.1

5 0
2 years ago
Bacteria with the ability to break down certain types of plastic are placed with a colony of E. coli bacteria that lack this abi
iogann1982 [59]

Answer:

D. Plasmids are nucleic acids which can pass on traits

Explanation:

A Nucleic acid is one of the four biomolecule polymers in living systems. It is made up of monomeric units called Nucleotides. RNA and DNA are the two nucleic acids in existence and they function in storage and expression of genetic information.

According to the question, a colony of bacteria that can break plastics were mixed with the colony that can't break plastics. The two different colonies engage plamids, which conferred the ability to break plastics to some of the colonies that previously couldn't. This tells us that the ability to break plastics in the certain bacteria colony is GENETIC.

If the trait is genetic, the plasmid must be a nucleic acid because of the ability to genetically pass on traits. Note that, a plasmid is an extra-chromosomal DNA (nucleic acid) capable of replicating on its own. Hence, plasmids are nucleic acids which can pass on traits.

8 0
1 year ago
1. Please describe the signal transmission across a myoneural junction that allows the nervous system to move the muscles of a f
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1. Action potential reaches the axon terminal and depolarizes it.

2. Depolarization opens voltage-gated calcium channels, enabling influx of Ca into the neuron.

3. Calcium binds to specialized proteins on vesicles (containing pre-made acetylcholine) and triggers them to fuse with the neuron membrane at the synapse.

4. Exocytosis of acetylcholine into the synaptic cleft occurs.

5. Acetylcholine diffuses across the synapse and binds to nicotinic receptors on the end plate of the myocyte.

6. Activated nicotinic receptors, themselves ion channels, cause cation influx into the myocyte and generate an end plate potential. This eventually gives rise to the full depolarization within the myocyte that enables contraction.
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2 years ago
Which of the following is true about a spinal reflex?
iren [92.7K]
100% shore its B hope that helps you good luck 
3 0
1 year ago
HELP PLEASE ASAP!!!! I don't understand this
nataly862011 [7]

Answer: D

Explanation: you got the one you click on right so no changes needed.

8 0
1 year ago
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