Telescopes make things bigger and microscopes make things smaller. True False

4. What genotypes of parents will have only white-fur offspring? Parent 1 genotype = Parent 2 genotype = What genotypes of paren

AnnZ [28]

Answer:

All white offspring: Parent 1 genotype = homozygous dominant

Parent 2 genotype = homozygous/heterozygous dominant

For all black offspring: Parent 1 genotype = homozygous recessive

Parent 2 genotype = homozygous recessive

Explanation:

The cross was between a white mouse and a black mouse and the phenotypic ratio of the resulting offspring is 50% white and 50% black.

Assuming that fur color in the mouse is represented by the allele A (a), In order to give 1:1 phenotypic ratio of the offspring, it means the white mouse is heterozygous with Aa genotype and the black mouse is homozygous with aa genotype. Also, it means that the allele A is dominant over the allele a.

Aa x aa

Aa Aa aa aa

Aa = white

aa = black

Ratio of white to black = 50/50 or 1:1

Hence, in order for a cross to yield only white offspring, the parents can either be homozygous AA and AA or one will be homozygous AA and the other will be heterozygous Aa.

1. AA x AA

AA AA AA AA (all white offspring)

2. AA x Aa

AA Aa AA Aa (all white offspring).

In order to produce only black offspring, both parents must be homozygous aa.

aa x aa

aa aa aa aa (all black offspring)

4 0

4 years ago

Coal is solid rock that began as organic material that was deposited in a swamp. The formation of coal suggests that A. Geologic

valkas [14]

Answer: A. Geological processes continue over millions of years.

A swamp is a wetland which exhibit the growth of vegetation. It consist of vegetation which is being dominated by trees. When these trees die, the wooden parts sank below the water. The wood remains being deposited at the bottom of the water body causes the formation of coal. Coal formation results due to the wood being compressed and buried. It takes millions of years for the transformation of wood into coal in the geosphere of the swamp region.

Hence, formation of coal is a geological process and it takes millions of years for it's formation.

8 0

3 years ago

What is a model..???

vazorg [7]

What kind of model there is many kinds

5 0

3 years ago

Read 2 more answers

Can you identify the type of root by only looking at the structure of the leaf explain â

Blababa [14]

Answer:

Simple answer, yes.

Explanation:

Monocots have isobilateral leaf I.e both sides of the leaf are equally exposed to the sun.

Dicots have dorsiventral leaf I.e. ventral side is exposed to the sun more than the dorsal side.

They are very distinctly different from each other and can be separated easily, and so are their roots.

4 0

3 years ago

How did the frequency of stimulation affect the amount of force generated by the isolated skeletal muscle when the frequency of

Alexxandr [17]

Answer:

When the frequency of stimulation of a muscle increases -without it having the opportunity to relax- a process called summation (addition) occurs, promoting an increase in the generation of force in the isolated skeletal muscle.

Explanation:

Summation is a phenomenon that occurs as a consequence of the arrival of successive stimuli that produce the contraction of the skeletal muscle before it achieves its partial or total relaxation, between subsequent stimuli.

When the summation occurs in the muscle, the force generated on it increases its magnitude proportionally to the number of stimuli received, maintaining the muscle contraction in time.

Tetany is the prolonged contraction of a muscle in an abnormal way, by the summation of stimuli received , as some bacterial toxins can produce. The summation can be temporary -when multiple stimuli reach the muscle in a determined time- or spatial, when the amount of stimuli activates a greater amount of motor units.

Learn more:

Spatial summation in a post synaptic neuron brainly.com/question/9632682

3 0

4 years ago