The genetic material found within a cell

Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles. Howe

krok68 [10]

Part 1.

The correct answer is option 2.There are two alleles for freckles.

According to the condition of the occurrence of the freckles, it can be concluded that the freckle is an autosomal dominant condition. The freckle can only be inherited, if there is at least one dominant allele in any of the parent. If both the individuals are heterozygous for the trait, they can produce an offspring without freckle by passing down the recessive alleles to the progeny. So, the freckles are controlled by two alleles, which can be either dominant or recessive.

Part 2.

The correct answer is option 4. P generation and F2 generation.

In this case, it is given that true bred homozygous recessive plant is crossed with true bred homozygous dominant plant. The true bred recessive plant always shows the recessive phenotype. When true bred homozygous recessive plant is crossed with true bred homozygous dominant plant, the F1 generation would produce all the heterozygous individual and exhibit dominant phenotype. When the F1 generation is self crossed, it result in 75% dominant phenotype and 25% recessive phenotype.

A possible cross for this case is given in the picture.

8 0

3 years ago

Read 2 more answers

Dr. John Smith is a research scientist. He uses the information from his research to develop a drug for bipolar disorder. Dr. Sm

jok3333 [9.3K]

Answer:

The answer should be A. applied research scientist.

Explanation:

6 0

3 years ago

1.

Leto [7]

1. Sustainable 2. Environmental

3 0

4 years ago

30POINTS AND BRAINLEST

SCORPION-xisa [38]

Answer:

We are losing Earth's greatest biological treasures just as we are beginning to appreciate their true value. Rainforests once covered 14% of the earth's land surface; now they cover a mere 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.

One and one-half acres of rainforest are lost every second with tragic consequences for both developing and industrial countries.

Rainforests are being destroyed because the value of rainforest land is perceived as only the value of its timber by short-sighted governments, multi-national logging companies, and land owners.

Nearly half of the world's species of plants, animals and microorganisms will be destroyed or severely threatened over the next quarter century due to rainforest deforestation.

Experts estimates that we are losing 137 plant, animal and insect species every single day due to rainforest deforestation. That equates to 50,000 species a year. As the rainforest species disappear, so do many possible cures for life-threatening diseases. Currently, 121 prescription drugs sold worldwide come from plant-derived sources. While 25% of Western pharmaceuticals are derived from rainforest ingredients, less that 1% of these tropical trees and plants have been tested by scientists.

Most rainforests are cleared by chainsaws, bulldozers and fires for its timber value and then are followed by farming and ranching operations, even by world giants like Mitsubishi Corporation, Georgia Pacific, Texaco and Unocal.

There were an estimated ten million Indians living in the Amazonian Rainforest five centuries ago. Today there are less than 200,000.

In Brazil alone, European colonists have destroyed more than 90 indigenous tribes since the 1900's. With them have gone centuries of accumulated knowledge of the medicinal value of rainforest species. As their homelands continue to be destroyed by deforestation, rainforest peoples are also disappearing.

Most medicine men and shamans remaining in the Rainforests today are 70 years old or more. Each time a rainforest medicine man dies, it is as if a library has burned down.

When a medicine man dies without passing his arts on to the next generation, the tribe and the world loses thousands of years of irreplaceable knowledge about medicinal plants.

Explanation:

5 0

3 years ago

A country was experiencing high birth rates because of widespread illiteracy. At the same time an epidemic broke out in this cou

Setler [38]

Answer:

B. urbanization

Explanation:

In urbanizing stage, death rate quickly declined because of the improvements in agricultural aspect which goes down to food supplies, health care delivery, medicine improvements, and even the investments in sanitation and infrastructure which contributes to the increasing life expectancy of the people and lesser diseases which cause deaths. Though birth rates remain almost the same, but young population continues to grow because of the low death rate.

5 0

3 years ago