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2 years ago

Cystic fibrosis is a recessive gene disorder. The pedigree chart for a family known to have cystic fibrosis is shown below.

Biology

2 answers:

Maksim231197 [3]2 years ago

8 0

Answer:

25%

Explanation:

I took the test and got it right, pls give brainlist

Ierofanga [76]2 years ago

6 0

Answer:

50%

Explanation:

So this would mean that the white color is a recessive trait. The answer would then be the allele for white flowers is recessive in the pea plant.

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If a population of termites were treated with a chemical that destroyed all of the trichonymphids living in their gut, what woul

timofeeve [1]

<span>If a population of termites was treated with a chemical that destroyed all of the trichonymphids living in their gut, the most likely consequence to happen is that the termites would die because they would not be able to digest cellulose in wood.</span>

6 0

3 years ago

Vitamins a and c, thiamin, calcium, and magnesium are considered _____.

tatyana61 [14]

Answer : micronutrients

8 0

3 years ago

In humans, red-green color blindness is determined by an X-linked recessive allele (a), whereas eye color is determined by an au

sineoko [7]

Answer:

1. XaY,BB and XaY,Bb

2. Father: XaY,Bb

Mother: XAXa,bb

Son: XaY,Bb

Daughter: XaXa,bb

Explanation:

1. Gender: Male --> XY, Color-blind male: XaY, Brown-eyed: BB or Bb. Combine the aforementioned, the gametes can be formed with respect to these genes by a heterozygous, brown-eyed, color-blind male are: XaY,BB and XaY,Bb

2. MOTHER: Blue-eyed female with normal vision : XAXA,bb or XAXa,bb

SON: brown-eyed male, color-blind: XaY,BB or XaY,Bb

DAUGHTER: blue- eyed female, color-blind: XaXa,bb

From the genotype of the son, we can assume that the father must has brown eyes: BB or Bb. Besides, the daughter has blue eyes. Thus, the daughter received the autosomal gene "b" from her parents. At the conclusion, the father eyes color genes is Bb. We can assume that Father genre can be XAY,Bb or XaY,Bb.

Both of son and daughter are color-blind. Thus, Mother genotypes should have Xa. Finally, Mother Genotypes is: XAXa,bb.

Because both children are color-blind, the father genre is: XaY,Bb, brown eyes and color-blind male

Mother (XAXa,bb) × Father (XaY,Bb)

Son 1: (XAY,Bb) clear vision and brown eyes
Son 2: (XAY,bb) clear vision and blue eyes
Son 3: (XaY,Bb) color blindness and brown eyes
Son 4: (XaY,bb) color blindness and blue eyes

Daughter 1: (XAXa,Bb) clear vision and brown eyes
Daughter 2: (XAXa,bb) clear vision and blue eyes
Daughter 3: (XaXa,Bb) color blindness and brown eyes
Daughter 4: (XaXa,bb) color blindness and blue eyes

3 0

3 years ago

How many new volumes would each new cell contain whenever a cell splits?

Elenna [48]

The specific volume will be different for various kinds of cells. The safe answer would be that the new cell will pretty much have the same volume as the one that it divided from. This is true for most eukaryotic cells unless other factors like epigenetics or mutations come into place.

One example of moments a cell would increase in volume is during hypertrophy. This simply means that the cell is increasing in size (compared to: hyperplasia -- which is an increase in number of the cells). Hypertrophy is definitely an increase in volume of the cell but this doesn't necessarily translate to cell division (i.e. just because the cell is big now, doesn't mean it will still be big when it divides).

Another moment of increasing volume of the cell and now also related to cell division would be during the two stages in the cell cycle (i.e., G1 and G2 phases). This is the growth phase of the cell preparing to divide. However when mitosis or division happens, the cells will normally end with the same volume as when it started.

This are safe generalizations referring to the human cells. It would help if a more specific kind of cell was given.

4 0

4 years ago

Read 2 more answers

Which of the following environmental conditions would be MOST likely to result in transcription of the lac

Kruka [31]

Answer:

The correct answer is B high levels of lactose and high levels of cyclic AMP.

Explanation:

Lac operon contain 3 regulatory genes and 3 structural genes.In presence of lactose the repressor molecule that is encoded by Lac I gene cannot bound to the operator region.

Bacause the lactose interact with the repressor and change its conformation so that it cannot repress the expression of the structural genes of lac operon.

On the other hand cyclic AMP is a positive regulator of lac operon .The interaction of cyclic AMP with the promoter region of lac operon stimulates the binding of RNA polymerase in the promoter region to boost the expression of structural genes of lac operon such as Lac Z,Lac Y and Lac A.

4 0

4 years ago