Can someone help me with my biology final review ?

Define independent assortment within the framework of meiosis. What impact does homologous recombination have on the principle o

Paul [167]

Answer:

The law of independent assortment states that the different genes get separated independently of each other and gets assorted into gametes to produce different combination of genes.

It was formulates by famous scientist G. Mendel based on his work on peas.

For example, in a traditional dihybrid cross of true breeding round and yellow seed plant with wrinkled and green seed plant, F2 generation show four different combinations of phenotype:

round and yellow
round and green
wrinkled and yellow
wrinkled and green

It shows that genes for round and yellow were independently inherited and genes for wrinkled and green were independently inherited. Else, new combinations could not be observed.

Homologous recombination is an event that takes place in prophase I during meiosis. The genetic material is exchanged between the non-sister chromtids of homologous chromosomes. It adds into the genetic variation within a population by producing more combination of genes in the gametes.

It does not violate the law of independent assortment as the genes were independently assorted. It only helps in producing more combinations of genes.

6 0

3 years ago

Ecosystems with greater biodiversity have an increased stability.

IRINA_888 [86]

Yes, this is correct!

Let's imagine two systems, one with 50 species and one with 4000. Both of them experience a draught and as a result 25 species of the first one die (that's quite likely) and 800 of the second population die out (more would not be very likely).
So the first one lost 50% of species and the second one 20% - that means that the second one, with greater biodiversity has a bigger stability:)

4 0

4 years ago

Read 2 more answers

X

ehidna [41]

Increased global temperatures have decreased disease incidence of the cattle, leading to their increased growth.

The correct option is A.

<h3>What is an example of growth?</h3>

A gradual increase in time, size, mass, or height is referred to as growth. An example of maturity is a rowdy teen who grew noticeably quieter in her late 20s. A boy that grows an inch taller between both the ages of 14 and 15 is an illustration of growth.

<h3>What causes growth?</h3>

Hormones created by the pituitary gland in the brain regulate a person's body's growth from the moment they are born. Growth hormone, sometimes referred to as human growth hormone, HGH, or GH, is the most crucial hormone for growth.

To know more about Growth visit:

brainly.com/question/15561411

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The complete question is -

Average cattle size over the past 100 years has increased steadily. Cows, on average, are more than 100 pounds heavier than they were a century ago. What is the most likely explanation of the increases observed in the cows?

A- Increased global temperatures have decreased disease incidence of the cattle, leading to their increased growth.

B- Increased water availability as water levels rise increased the growth and mass of the cattle.

C- Decreased competition with other mammal species in the wild has increased the aver-age growth rate of cattle.

D- Humans have bred the cattle to have improved genetics that increase growth rates and mass.

8 0

1 year ago

Describe plant with lower epidermis function

aksik [14]

The lower epidermis layer contains stomata. Stomata prevent the loss of water and regulate the exchange of oxygen and carbon dioxide. The lower epidermis may also contain a waxy layer to further prevent water loss. Plant with these features are typically the xerophytic plants, which grow in arid conditions.

5 0

3 years ago

What is soil profile?

Lilit [14]

Soil develops in horizontal layers.If we cut vertically into the earth ,the different layers become visible.A soil profile is a sample taken from the surface down through the soil . The horizontal layers of soil are called soil Horizons.

5 0

3 years ago