Unit 11 weather and climate

Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color

Anarel [89]

In a double cross of two heterozygotes for both traits ( BrBl Rbx BrBl Rb) we would get a <span>9:3:3:1 phenotypic ratio.
9 Brown body, red eyes (both dominant traits)
3 brown body, brown eyes (one dominant, one recessive trait)
3 black body, red eyes ( one recessive and one dominant trait)
1 black body, brown eyes ( both recessive traits)</span>

8 0

3 years ago

Read 2 more answers

Need help asap!!!!!!!!!

Ivahew [28]

To answer this question you must break apart the words given on the right.
“Eco” means life and production. So an ecologist would be someone who studies life and it’s processes. So the correct answer for the first blank would be C. Life Science.

A chemist is one who interacts with day to day elements and sciences that is tactile. So the most appropriate answer would be B. Physical science.

A geologist is someone who studies the earth. As the part of the word “geo,” meaning earth, suggests. So the correct answer here would be A. Earth science.

Finally, “Astro” means space .Astrology is the study of the stars and the sky, for example. So, D. Space science would be the best answer for an astronaut.

I hope all of these are helpful. :)

3 0

3 years ago

How are the plants in a specific environment be impacted if there was a sudden drop in amount of bacteria present in that area?

Rainbow [258]

I think this information may be help you
The plants in a specific environment be impacted if there was a sudden drop in the amount of bacteria present in that area, there are positive and negative consequences associated with this situation.

Positive:

The decrease in bacterial colonization will prevent the plant from the diseases caused by the bacteria and this will promote plant growth. Like, black rot in Brassica caused by Xanthomonas campestris, bacterial canker in tomato, capsicum and chilli caused by Clavibacter michiganesis.

Negative:

Plants remains in symbiotic relationship with bacteria in order to obtain impermeable inorganic minerals from the soil. In the absence of bacteria, the plants will not receive these nutrients, and their growth may be hampered. Example bacteria fixes atmospheric nitrogen which is taken up by the root nodules of leguminous plants. In return these bacteria gets the food like carbohydrates produce by the plants

3 0

3 years ago

The curly toe phenotype is controlled by 4 genes that act in an additive manner. The environment does not have an effect on this

Sergio [31]

Answer:

What is the highest number of risk units an individual can have with this model? 48 units of risk
What is the phenotype of an individual of genotype AaBbCCDd? The individual has curly toes
Is it possible for them to have a child with curly toes?

Yes, the couple can have children with curly toes.

Explanation:

<u>Available data</u>:

The curly toe phenotype is controlled by 4 diallelic additive genes
Genes A, B, C, D
A dominant allele has 6 units of risk
A recessive allele has 2 units of risk
Individuals with more than 35 units of risk have curly toes
Individuals with 35 or fewer risk units have straight toes

The term quantitative heritability refers to the transmission of a phenotypic trait in which expression depends on the additive effect of a series of genes.

Polygenic heritability occurs when a trait results from the interaction of more than one gene. And these genes can also have more than two alleles. The action of many genes and alleles can cause many different combinations that are the reason for genotypic graduation.

Quantitative traits are those that can be measure, such as longitude, weight, eggs laid per female, among others. These characters do not group individuals by any precise and clear categories. Instead, they group individuals in many different categories that depend on how the genes were intercrossed and distributed during meiosis. The result depends on the magnitude in which each allele contributes to the final phenotype and genotype. When they interact, they create a gradation in phenotypes, according to the level of contribution.

According to this information, and knowing how each allele contributes to the risk, we can say that the minimum units of risk are 16, determined by the recessive genotype aabbccdd. Each recessive allele contributes with 2 units of risk, so (aa=4units + bb=4 units + cc=4 units + dd=4 units) = 16 units.

Each time a dominant allele is present in the genotype, it adds 6 units to the total risk.

What is the highest number of risk units an individual can have with this model?

48 units of risk, which corresponds to the genotype AABBCCDD. Each dominant allele contributes 6 units to the risk. There are 8 dominant alleles, so, 8x6=48 units.

What is the phenotype of an individual of genotype AaBbCCDd?

The individual has curly toes because it has a risk of 36 units, which is superior to the limit of 35 units. Dominant alleles A, B, C, C, D contribute with 30 units of risk (6x5), and recessive alleles a, b, d contribute 6 units of risk (3x2).

Cross:

Parentals) AAbbCcDd x AaBbCCDd

Gametes) AbCD, AbcD, AbCd, Abcd

ABCD, ABCd, AbCD, AbCd, aBCD, aBCd, abCD, abCd

Punnett square) AbCD AbcD AbCd Abcd

ABCD AABbCCDD AABbCcDD AABbCCDd AABbCcDd

ABCd AABbCCDd AABbCcDd AABbCCdd AABbCcdd

AbCD AAbbCCDD AAbbCcDD AAbbCCDd AAbbCcDd

AbCd AAbbCCDd AAbbCcDd AAbbCCdd AAbbCcdd

aBCD AaBbCCDD AaBbCcDD AaBbCCDd AaBbCcDd

aBCd AaBbCCDd AaBbCcDd AaBbCCdd AaBbCcdd

abCD AabbCCDD AabbCcDD AabbCCDd AabbCcDd

abCd AabbCCDd AabbCcDd AabbCCdd AabbCcdd

F1) 16 /32 = 1/2 individuals in the progeny are expected to have curly toes

16 /32 = 1/2 individuals are expected to have straight toes

Is it possible for them to have a child with curly toes?

Yes, the couple can have children with curly toes.

To have curly toes, individuals must have more than 35 units of risk.

To have more than 35 units, individuals´ genotypes must carry at least 5 dominant alleles (which equal 30 units).

8 0

2 years ago

Which of the following is a way to conserve water quality?

NemiM [27]

Reducing the Chemicals dumped into wastewater

5 0

2 years ago

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