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rusak2 [61]
3 years ago
10

an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a

penicillin resistant gene.now when ecoli is grown without penicillin,some colonies are penicillin sensitive and lac+.how?
Biology
1 answer:
Nuetrik [128]3 years ago
6 0

Answer:

an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a penicillin resistant gene.now when ecoli is grown without penicillin,some colonies are penicillin sensitive and lac+.how? could be explained by an ecoli strain is chromosomally lacZ- but a wildtype copy of entire lac operon is present on an F' plasmid which in turn has a penicillin resistant gene.now when ecoli is grown without penicillin.

Explanation:

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A litter of four kittens includes one with black hair and blue eyes, one with black hair and orange eyes, one with brown tabby h
Hoochie [10]

Answer:

Law of independent assortment

Explanation:

According to Gregor Mendel who he performed a performed a cross involving two different genes i.e. a dihybrid cross, he stated that the allele of one gene will get sorted into gametes independently of the alleles of the other gene. He called this the LAW OF INDEPENDENT ASSORTMENT.

He obtained a 9:3:3:1 ratio when he performed this cross, which was only expected if each gametes contained the two genes in a combined state i.e. the dominant allele for one gene is equally likely to contain a dominant or recessive allele for the other gene in a gamete.

In this case, it appears the black hair and blue eyes are dominant alleles respectively while the tabby hair and orange eyes are recessive alleles respectively. If these alleles assort independently and combine in different ways, it will give rise to diverse genotypes and phenotypes in the kitten as illustated in the different phenotypic expression of eye color and hair color in the kitten.

5 0
3 years ago
Low does natural selection lead to the evolution of a population?
Komok [63]

Explanation:

when natural selection is cartried out it leads to the species being the fittest inorder words it is called survival of the fittest inorder to promote evolution

7 0
3 years ago
Please help with just part one and punnet square
Inessa05 [86]

The earlobe trait is denoted by E and e alleles, whereas the eye trait is denoted by B and b alleles. The Punnet square allows identifying the expected proportions in the progeny.

<h3>The Punnett square and inheritance </h3>

The Punnett square is a diagram used to represent the gamete combinations in order to estimate genotypes and phenotypes in the progeny.

The earlobe trait is denoted by E and e alleles, thereby there are two types of gametes in heterozygous individuals.

In this case:

           E            e

E        EE          Ee

e       Ee          ee

Moreover, the eye trait is denoted by B and b alleles, thereby there are two types of gametes in heterozygous individuals.

In this case:

           B            b

B        BB          Bb

b       Bb          bb

Learn more about Punnett square here:

brainly.com/question/9582290

5 0
2 years ago
If wolves had not been brought to the island, what factors might influence the deer population size
vlada-n [284]
Some factors could be:
weather
ressources
6 0
3 years ago
WORTH 50 POINTS!!
AnnZ [28]
The correct answer is D
4 0
3 years ago
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