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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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Kip studies flower color in petunias, where the allele for red flowers, R, is dominant to the allele for white flowers, r. If Ki
Doss [256]
What is tRNA involved in?

7 0
3 years ago
Read 2 more answers
Explain the different levels of cellular organization.
JulijaS [17]

There are 5 different levels of cellular organization.

Cells, tissues, organs, organ systems and whole organisms. Cells hold genetic material and absorb outside energy.

Tissues make up the bones, nerves and connective fibers of the body. Organs work to perform specific bodily tasks, such as filtering blood. Organ systems are groups of organs that perform a specific kind of function together, such as digesting food.

Together, these smaller systems make up an entire living organism which can grow and then go onto reproduce.

Explanation:

5 0
3 years ago
Mutation is a random and non-adaptive process. This was first proven by:
s2008m [1.1K]

Answer:

Option (d).

Explanation:

Mutation may be defined as the sudden, heritable change in the nucleotide sequence of the organism. Mutation may occur due to the errors in DNA replication or may occurs due to the mutagens.

Joshua and Lederberg experiment explains that mutation is the non adaptive and random process that occur in the organism. He used the replica plating of E.coli and grows them on streptomycin drug. The bacteria was grown on the the primary plate and they are transferred to the secondary plate with streptomycin drug in the growth environment. The resistant strain of bacteria grows in the streptomycin environment.The pattern of bacteria growth on the plate explained that mutation occurs randomly and it is a non adaptive process.

Thus, the correct answer is option (d).

4 0
3 years ago
!!Help!! In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f
tatiyna

Answer:

% GENOTYPE

FF = 0%

Ff = 50%

ff = 50%

% PHENOTYPE

Black fur = 50%

Grey fur = 60%

Explanation:

This question involves a single gene coding for fur color in dogs. The allele for grey fur (F) is dominant over the allele for black fur (f). This means that a heterozygous dog (Ff) will have a grey fur.

In this question, a heterozygous female (Ff) is said to cross with a recessive male (ff) i.e. Ff × ff. The following gametes will be produced by each parent:

Ff - F and f

ff - f and f

Using these gametes in a punnet square (see attached image), the following genotypic proportion of offsprings will be produced:

Ff - 1/2 = 50%

ff - 1/2 = 50%

Ff is phenotypically GREY while ff is phenotypically BLACK. This means that 50% of the offsprings will be black and 50% will be grey.

7 0
3 years ago
6.Prokarytes differ from eukaryotes by
geniusboy [140]

Answer:

a. enclosing their DNA in a nucleus.

Explanation:

Prokaryotes in general have no membrane bound organelles. The cells are enclosed in a plasma membrane though .

4 0
3 years ago
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