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FinnZ [79.3K]
2 years ago
14

Pls help me!!

Biology
1 answer:
klio [65]2 years ago
4 0

Answer:

In explanation.

Explanation:

What is a punnett square used for?

It is a way to store data and keep track of things. It helps to predict the variations and probabilities that can come from cross breeding.

What do the probabilities of the possible offspring all add up to?

All can have 100%, 75%, 50%, or 25% depending on the specific trait.

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What would be the outcome of crossing two strains of wingless flies that belong to the same complementation group?
STALIN [3.7K]

Answer:

Wingless offspring

Explanation:

Complementation is the terminology used for finding difference in the mutation of same or different gene.  

Two groups with same complementation have failed to complement each other.  

Thus, two wingless flies will have the same genotype i.e “ww”

When two wingless flies are crossed following offspring are produced  

ww * ww  

ww, ww, ww, ww

All the offspring are wingless too

8 0
3 years ago
An experiment was designed to investigate if caffeine would raise the heartbeat of water fleas. Two groups of water fleas were u
fgiga [73]

Answer:

That is administered and controlled

Step-by-step explanation:

A variable is the condition or a product that may vary without the influence of any investigator. Such variables can be found abundantly in our daily lives, ranging from air to sunlight. Controlling such variables ensures the limitation of their influence on the outcome of an experiment. In connection to this experiment, the variables that are controlled are the mineral content in the water, the  amount of bacteria food, the amount of light and the the constant temperature of 20 degrees C.

If not administered or these variables controlled, the experiment would not clearly explain the impact of caffeine on the heart beat of the water fleas as other variables may have influenced it. Thus variables are controlled to study the singular impact of any agent or effect.  

8 0
3 years ago
What is the concentration of a suspension that grew 89 colonies on a plate with a dilution of 1:100?
mafiozo [28]

Answer:

8900 CFU/mL

Explanation:

Colony Forming Units (CFU) is a value that indicates the degree of microbiological contamination of an environment. It expresses the relative number of microorganisms of a given taxon in a volume of one cubic meter of water.

UFC is the minimum number of separable cells on the surface, or inside, of a semi-solid agar medium that results in the development of a visible colony of the order of tens of millions of descending cells. The CFUs can be pairs, chains or clusters, as well as individual cells. Colony forming unit.

Calculation

Colonies * Dilution = CFU/mL

89          *  (100/ 1 mL) = CFU/mL

8900 CFU/mL

3 0
3 years ago
Which developmental milestone must be reached before an infant experiences separation anxiety? (a) imprinting (b) theory of mind
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Object permanence is the developmental milestone that must be reached before an infant experiences separation anxiety.  It is used to describe the ability of a child to know that objects continue to exist despite the fact that they can no longer be perceived that is , seen or heard, touched, smelled, or sensed in any way. This milestone is developed through touching and handling objects by the infants.
6 0
3 years ago
What is homozygous ?
Ganezh [65]

Answer:

<h2>an organism in which both copies of a given gene have the same allel is homozygous. </h2>
6 0
3 years ago
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