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nexus9112 [7]
3 years ago
8

What was the first instrument used to observe MICROSCOPIC objects?

Biology
1 answer:
Lorico [155]3 years ago
6 0

Answer:

b

Explanation:

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Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as an X-linked recessive allele in humans. A woman whose father
prohojiy [21]

Answer:

(a) 1/2; (b) no

Explanation:

Glucose-6-phosphate dehydrogenase deficiency (G6PD) is an X-linked recessive disorder and the woman's father was diseased so it means that woman is a carrier of the allele but has normal phenotype. It means that she will have XXᵇ genotype.

In contrast to this, her husband is diseased so his genotype will be XᵇY.

The Punnett square diagram related to the cross is attached.

(a) Proportion of their sons expected to be G6PD is 1/2:

They both may give birth to 4 progeny with genotypes XXᵇ, XᵇXᵇ, XY and XᵇY. It means they both may have 2 sons out of which one with genotype XᵇY will be diseased while the one with genotype XY will be healthy. So the proportion of their sons having G6PD is 1/2 or 50%.

(b) If the husband were G6PD deficient, the answer will not change.

The reason behind this is that this disease is caused by an allele located in X chromosome. But father contributes only Y chromosome to his son not X chromosome. The X chromosome will affect the genotype of his daughter not son that is why answer will not change. It means they will still have 1/2 of their sons diseased.  

7 0
3 years ago
Help please identify the label structures in the longitudinal section of the a stem tip
zhuklara [117]

Answer:

Explanation:

I hope this is what your looking for but I hope it helps in a way!!!!

3 0
2 years ago
Creating hypotheses based on observations.A hypothesis is a general principle or explanation that is derived from observations.
Alex17521 [72]

Answer:

  1. False
  2. True
  3. True
  4. False
  5. False
  6. True

Explanation:

A hypothesis is a supposition draw from data to carry an investigation or an argumentation.

1. The onion cells I looked at have a nucleus. False, even though the statement is true, is not a hypothesis because is not a supposition, it is rather an observation.

2. All onion cells have a nucleus. True, it is s a <u>valid hypothesis</u> because after the observation of 10 cells you draw a conclusion or supposition and affirm that all onion cells have a nucleus.

3. All cells have a nucleus. True, it is a<u> valid hypothesis</u> it contains a supposition derived from data observation

4. Some cells have a nucleus. False, the hypothesis is not valid because all of the observed cells contained nucleus not only some of them.

5. Only onion cells have a nucleus. False, after the observation of the different type of cells you see that they all had nucleus.

6. If I look at 10 skin cells from my hand, each one will have a nucleus. True, after the observation of different cells you can infer that if you look at your skin cells, they will have a nucleus.

6 0
3 years ago
What is cellurar respiration?
Harman [31]

Answer:cellular respiration is a process by which cells use oxygen to produce energy from food.

This happens in the mitochondria

5 0
3 years ago
Which type of mutation does the model demonstrate?
ahrayia [7]

Answer:

G

Explanation:

TATC is being inserted into the sequence

4 0
3 years ago
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