A small rocky body orbiting the sun
Answer:
Elastic collisions are collisions in which both momentum and kinetic energy are conserved. The total system kinetic energy before the collision equals the total system kinetic energy after the collision. In the collision between the two cars, total system momentum is conserved.
Answer:
C
Explanation:
Usually if 1 out of 4 children in a family have a different hair color, it is because of the recessive gene passed down from the mother or fathers genes.
Answer:
0.4
Explanation:
Narrow sense heritability is a form of heritability (the other one is broad sense) that is used to describe the percentage of trait variance that is caused as a result of additive genetic factors. It is represented as h² = Va / Vp
Where Va = additive genetic variance
Vp = phenotypic variance
In this case, to get the narrow-sense heritability of pumpkin weight in this population
We have the following
mean weight of original pumpkin patch = 10lbs
weight of a group of original pumpkin = 15lbs
the average weight of offspring pumpkin = 12lbs
Hence we have h² = Va / Vp
= (12 - 10) ÷ (15 ÷ 10)
= 0.4
Meiosis is referred to as reduction division as it divides the chromosome number in half. Crossing over or recombination is the main reason of shuffled genes and increased genetic variation in gametes in meiotic cell division as the homologous pairs are paired up during prophase.
<h3>What is crossing over?</h3>
Crossing over is referred to as the exchange of genes of DNA between paired homologous chromosomes. It actually occurs during the development of egg and sperm cells i.e., during meiosis.
It is an enzyme-mediated step, in which the exchange of genetic material takes place between non-sister chromatids of homologous chromosomes.
It actually occurs at the pachytene stage of prophase I of meiosis cell division.
Thus, it can be concluded that the crossing over is the main reason of shuffled genes and increased genetic variation.
For more details regarding crossing over, visit:
brainly.com/question/19671756
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