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pav-90 [236]
3 years ago
15

A scientist is observing elephants in Asia. He notices that a specific species of moth lands on the faces of the elephants. On c

loser observation, he sees that the moths irritate the eyes of the elephants and then drink the tears that emerge.
Biology
1 answer:
erica [24]3 years ago
8 0
Okay so what is the question?
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Place the events in the correct order:
Alecsey [184]

Answer:

1. Chromatin condense into chromosomes.

4. Homologous chromosomes pair up (formation of tetrads).

5. Homologous chromosomes separate and move to poles.

2. Sister chromatids separate.

3. Chromosomes unravel in to chromatin.

Explanation:

This question portrays the process of meiosis in a cell. The ordered sequence of events in the options are:

1. Chromatin condense into chromosomes - This process occurs in the Prophase stage. Prior to the cell division, the nuclear material is found as Chromatin material. This Chromatin material then undergoes condensation to form visible chromosomes.

4. Homologous chromosomes pair up (formation of tetrads) - This process also occurs during the Prophase stage of meiosis I. In this stage, homologous chromosomes (similar but non-identical chromosomes received from each parent) are paired up side by side to form a structure known as TETRAD or BIVALENT.

5. Homologous chromosomes separate and move to poles - This process characterizes the Anaphase stage of meiosis I. Homologous chromosomes are pulled apart to opposite poles of the cell by spindle microtubules.

2. Sister chromatids separate - After meiosis I, meiosis II involving sister chromatids instead of homologous chromosomes follows. In the Anaphase stage of meiosis II specifically, sister chromatids are pulled apart towards opposite poles of the cell.

3. Chromosomes unravel in to chromatin - After the whole division process i.e. karyokinesis (division of the nuclear material), the chromosomes begin to unravel to form the CHROMATIN threads once again. This process occurs in the Telophase stage of meiosis.

5 0
3 years ago
A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white co
Rina8888 [55]

The question is incomplete. The complete question is:

Question: A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears of corn that have an approximately even mix of yellow and white kernels. Which term best describes the relationship between the two alleles?

a) Incomplete dominance

b) Genetic recombination

c) Chimerism

d) Codominance

Answer:

d) codominance

Explanation:

Codominance is a pattern of inheritance when none of the alleles of a gene is able to mask the expression of the other allele of the same gene. When the two alleles are present together in a heterozygous genotype, both are expressed and the phenotype of the heterozygote is different from both the pure breeding parents. In the given example, cross-pollination of yellow corn and white corn results in the ears of corn that have an approximately even mix of yellow and white kernels. This means that the heterozygote expresses both the allele for the corn color. Therefore, it represents codominance.

3 0
3 years ago
Why can’t certain blood types be combined?
scZoUnD [109]

Answer:

Because it causes complications with the person and the blood

Explanation:

3 0
3 years ago
Read 2 more answers
Which plant cell organelle contains dna and ribosomes?
Anestetic [448]

Answer:

mitochondrion

The correct answer: The plant cell organelle which contains its own DNA and ribosomes is D) mitochondrion.

3 0
2 years ago
Which of these is NOT found in a typical cell membrane? proteins carbohydrates lipids nucleic acids
vivado [14]
The answer would be Nucleic Acids
6 0
3 years ago
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