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tatiyna
3 years ago
8

10. In which phase will crossing-over occur?

Biology
1 answer:
maxonik [38]3 years ago
7 0

Answer:

C. Prohase 1

Explanation:

It is during prophase 1 of meiosis that crossing over occurs before tetrads or homologues pair of chromosomes are alligned across the equator of metaphase 1. In Meiosis 11, only the sister chromatics will be left or remain and the homologues pair of chromosomes would be moved to separate cells.

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What would happen if the Earth had just 5% more oxygen in the atmosphere​
7nadin3 [17]

if the Earth had 5% more oxygen in the atmosphere Global warming will happen.

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3 years ago
Independent assortment occurs only in cells that are heterozygous for two genes (AaBb) and not in cells that are completely homo
fomenos

Answer:

False

Explanation:

Gregor Mendel, who was referred to as the FATHER OF GENETICS, discovered the principles that governs heredity. One of those principles which he called LAW OF INDEPENDENT ASSORTMENT states that the alleles of a gene randomly segregates into gametes independently of the alleles of another gene. This means that during gamete formation (meiosis), the separation of the alleles of one gene doesn't affect the separation of the alleles of another gene.

Mendel discovered this principle when he worked with two genes that was responsible for two distinct characters. Hence, in a cell that contains two genes responsible for two different characters in the organism, independent assortment will always occur during gamete formation. Although, in an organism that is homozygous for both traits (AABB or aabb), only one type of allelic combination will be produced in the gamete. However, the alleles will still randomly align and separate independently of one another during Metaphase and Anaphase stages of meiosis.

4 0
3 years ago
Read 2 more answers
What is the symbiotic relationship between elephants and ants
Paraphin [41]

Answer:

plant helps ant and ant helps elephant

Explanation:

The plant provides shelter and food for the ants and it seems that the ants protect the plants from elephants

4 0
2 years ago
Process occurs in the<br> mitochondrion. Produces CO2
blagie [28]
Cellular respiration
3 0
3 years ago
A microbiologist has identified a new gram-negative pathogen that causes liver disease in rats. She suspects that the bacterium’
valina [46]
<h2>Koch's postulates </h2>

Explanation:

Koch formulated a set of criteria that could be used to identify the pathogen responsible for a specific disease and these criteria came to be known as Koch’s postulates:

The organism must be regularly associated with the disease and its characteristic lesions

The organism must be isolated from the diseased host and grown in culture

The disease must be reproduced when a pure culture of the organism is introduced into a healthy, susceptible host

The same organism must be re-isolated from the experimentally infected host

In the given hypothesis , Koch's postulates could be used as:

1) identify pathogen associated with disease 2) isolate or purify pathogen 3) test subject gets pathogen 4) same disease/ causes liver disease or not

3 0
3 years ago
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