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monitta
3 years ago
14

List by size: gene, cell, chromosome, atom, nucleus, base subunit, nucleotide

Biology
1 answer:
Makovka662 [10]3 years ago
4 0
Cell nucleus chromosome gene nucleotide base subunit atom
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1. A couple of mice with brown fur and black eyes had litter with the following distribution of traits: 9 with brown fur and bla
Ierofanga [76]

Answer:

The genotype of the couple of mice is heterozygous.

Explanation:

First, we going to classify each trait as dominant or recessive allele:

Brown fur: It’s a dominant allele because 12 of 16 mice have brown fur, therefore 75% of the litter have this trait.

Black eyes: It’s a dominant allele because 12 of 16 mice have black eyes, therefore 75% of the litter have this attribute.

Grey fur: It’s a recessive allele because only 4 of 16 mice have this trait, so 25% of the litter have grey fur.

Red eyes: It’s a recessive allele because 4 of 16 mice have red eyes, so 25% of the litter show this trait.

Second, we going to name each phenotype with a letter and use a capital letter for dominant allele or a small letter for recessive allele.  

For the color of the fur, let’s use letter “F”:  

F: Brown fur

f: Grey fur

For the color of the eyes, let’s use letter “E”:

E: Black eyes

e: Red eyes

The genotype of each phenotype is conformed by two letters that indicates, the recessive allele is showed in the phenotype only when both letters in the genotype are small letter.

For example, for fur, there are three combinations:

FF: Brown fur (two dominant alleles)

Ff: Brown fur (A dominant allele and a recessive allele)

ff: Grey fur (Two recessive alleles)  

For eyes, there are also three combinations:

EE: Black eyes (two dominant alleles) (

Ee: Black eyes (A dominant allele and a recessive allele)  

ee: Red eyes (Two recessive alleles)  

When both allele of the genotype are dominant or recessive, it is heterozygous, if there are a dominant allele and a recessive one, it is a homozygous.

Since there are 7 mice that show recessive phenotype, that means the genotype of the couple of mice are heterozygous. Although, both mice show a dominant phenotype, the genotype have a dominant allele and a recessive allele.

The genotype for the couple of mice is:

FfEe x FfEe

So, when we apply the Mendel's third law, we got the results showed in the chart.

5 0
3 years ago
The antibacterial activity of penicillin is related to the inhibition of a key bacterial enzyme. Explain this mechanism of enzym
serious [3.7K]

Answer:

Penicillin binds and inhibits bacterial enzyme DD-transpeptidase.

Explanation:

Penicillin is made up of 4 rings of β-lactam and acts by binding to DD-transpeptidase of bacteria. The DD-transpeptidase facilitates the cross-linking of the peptidoglycan cell wall of bacteria. This leads to malformation of the protective cell wall of the bacteria and causes it to lyze and die.

8 0
3 years ago
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals tha
notsponge [240]

Answer: the correct answer is (B) Whether others of the closely related group of plants also produce histidine in large quantities

Explanation:

This is a CAUSAL argument.

In a causal argument, A and B are observed together, and the CR concludes that A CAUSES B.

Premise = A and B are observed together:

A cultivated herb produces histidine and is able to grow in metal rich soils.

Conclusion = A causes B:

Histidine CAUSES the herb to be able to grow in metal rich soils.

One way to strengthen the conclusion that A causes B is give ANOTHER SUPPORTING EXAMPLE that links A to B.

4 0
2 years ago
What is the change in elevation between point B and point D?
BartSMP [9]
B. 20m

fillllllllllllll
8 0
1 year ago
Read 2 more answers
Seismic waves travel at different speeds according to type.
Umnica [9.8K]
Fastest is o over a hundred knots per hour slowest is from under one knot per hour
5 0
2 years ago
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