Which component of a eukaryotic cell breaks down at the start of replication and reforms at the end of

Biology

1 answer:

Wewaii [24]3 years ago

8 0

Answer:

<u>a.the nuclear membrane</u>

Explanation:

During the late stage of prophase, the nucleolus becomes dispersed in the nucleus and the nuclear membrane breaks down and disappears. This allows the chromosomes to be suspended well in the cytoplasm and get attached to the spindle apparatus.

In telophase, anew nuclear membrane forms around each set of chromatids. So two daughter nuclei are now formed. Each daughter nucleus ends up with the same diploid number of chromosomes as the parent cell. A nucleolus develops in the nucleus of each daughter cell.

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Two short-haired guinea pigs are mated several times. Out of 100 offspring, 25 of them have long hair. What are the probable gen

Alekssandra [29.7K]

Answer:

Ss (male) × Ss (female)

Explanation:

This question involves a single gene coding for hair length in guinea pigs. Based on the information in this question, the allele for short hair (S) is dominant over the allele for long hair (s). This means that a guinea pig will only be phenotypically long-haired if the genotype is "ss".

According to this question, Two short-haired guinea pigs are mated several times. Out of the 100 offsprings produced by this cross, 25 of them have long hair (recessive). This means that the phenotypic ratio of this cross is 3 short hair : 1 long hair i.e. 100 - 25 = 75 short hair. 75/25 = 3/1 = 3:1

To produce this phenotypic ratio, the parents must both be heterozygous (Ss) for the hair length gene.