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Fiesta28 [93]
3 years ago
6

Which type of chromosome abnormality is the most difficult?

Biology
1 answer:
Rzqust [24]3 years ago
3 0
Down syndrome, turner syndrome, Klinefelter syndrome, and fragile X syndrome.
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What are the differences between DNA and RNA?
STALIN [3.7K]
Summary of Differences Between DNA and RNA<span>DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. The only difference between ribose and deoxyribose is that ribose has one more -OH group than deoxyribose, which has -H attached to the second (2') carbon in the ring.DNA is a double stranded molecule while RNA is a single stranded molecule.DNA is stable under alkaline conditions while RNA is not stable.<span>DNA and RNA perform different functions in humans. DNA is responsible for storing and transferring genetic information while RNA directly codes for amino acids and as acts as a messenger between DNA and ribosomes to make proteins.</span></span>
8 0
3 years ago
In chickens, comb shape is determined by two independent genes (R and P). A walnut comb is produced when at least one dominant a
Aleksandr [31]

Answer:

Option B, Rr pp × rr Pp

Explanation:

Given

Walnut Comb is produces when  one dominant allele R is present at one gene locus and at least one dominant allele P is present at a second gene locus - R* P*

Rose Comb - at least one dominant allele is present at the first locus and two recessive alleles are present at the second locus - R* pp

Pea comb - two recessive alleles are present at the first locus and at least one dominant allele is present at the second  - rr P*

Single comb - two recessive alleles are present at the first and the second locus  - rrpp

Parent are rose combed and pea combed

For being rose genotype must be R* pp

and for being pea combed genotype must be rr P*

Rr pp x rr Pp

will  produce

Walnut comb  with genotype Rr Pp

Single comb  with genotype rrpp

and pea comb  with genotype rrPp

Hence, option B is correct

8 0
3 years ago
Read 2 more answers
Need help on how to start my paragraph
posledela
OK well first of all I hate biology but I like writing so you can use :: The molecular reactions of cellular respiration transform Krebs cycle into the more readily available bond energy of ATP.
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Neurons that carry impulses from the eyes to the spinal cord and brain are called
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The answer is Sensory Neurons
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Which of the definitions below best defines a mutation?
victus00 [196]

The correct answer is: A. A change in a cell's genetic material.

Mutations occur in DNA as a result of mistakes during the DNA replication (when repair mechanisms don’t fix it) or as the result of environmental factors (e.g. UV light). Mutations can have positive impact, by increasing the genetic variation or can have negative effect, causing the diseases or cancer.

8 0
3 years ago
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