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mars1129 [50]
2 years ago
15

Clarify why test crosses are used in selective breeding.

Biology
1 answer:
Artyom0805 [142]2 years ago
6 0
A test cross can be used to determine the genotype of the parent (whether it is homozygous or heterozygous for a specific trait).  
AA x aa = all Aa offspring, dominant phenotype. 

<span>Aa x aa = 1/2 Aa dominant and 1/2 aa recessive

</span>
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Which scientific term is used to describe a testable model that seeks to explain natural phenomenon
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A scientific experiment, in the form of the scientific model, is a testable model used to seek explanation for natural phenomena.
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3 years ago
What is the most plentiful fossil fuel? A: oil B:Natural has C: petroleum D: coal
neonofarm [45]

Answer:

d coal

Explanation:

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3 years ago
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8 0
3 years ago
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Which structure is a thick tract of white matter that interconnects the two cerebral hemispheres?
swat32

Answer:

The correct answer is corpus callosum.

Explanation:

Corpus callosum is one of the compositions of the brain, which is situated within the cortex and above the thalamus. It is a thick tract of white matter, which associates the left and the right hemispheres of the brain. It is the component of the brain, which permits communication between the two cerebral hemispheres.  

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8 0
3 years ago
what is the average time for the toy to move 1.0m. on dirt? A) 20.2 s, B) 24.2 s, C) 28.1 s, D) 60.7 s. ​ " Need help asap pleas
Illusion [34]

The correct answer is A. 20.2 s

Explanation:

The table shows there were three trials to measure how much time a toy car needs to move 1 meter on different surfaces. Now, to find the average time on a surface simply add the results of the three trials and divide this by number 3 (number of trials). The process to know the average time on dirt is shown below:

20 + 19.2 + 21.5 = 60.7 - Results of each of the trials

60.7 ÷ 3 = 20.2 s - Divide the total by the number of trials

This means the average time for the toy to move on dirt was 20.2s

5 0
3 years ago
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