crossing over occurs during the prophase I of meiosis, where homologous chromosomes pair up and exchange segments, contributing to genetic diversity in offspring.
The stage in meiosis where crossing over occurs is the prophase I. During this phase, the proteins associated with homologous chromosomes bring the pair close to each other, a process called synapsis.
The genes on the chromatids of the homologous chromosomes precisely align with each other, initiating an exchange of chromosome segments between non-sister homologous chromatids.
This exchange is known as crossing over, contributing greatly to genetic variation among organisms.
Following this process, the homologous chromosomes separate and distinct combinations of maternal and paternal chromosomes make their way into the gametes.
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b. their homelands were not suited to farming or gathering
c. hunting is healthier and easier than gathering
d. none of the above
The correct answer is option B
The Inuit traditionally were group of people living in the Artic and Sub-Artic regions of the globe. They usually moved across the land and ice which followed change in the season.
They usually relied on hunting because the land was not suitable for farming or gathering as they usually lived in the colder regions of the globe.
b. animals
c. bacteria
d. fungi
Answer: Option (C)
Explanation: Prokaryotes are those organisms that does not have a well defined nucleus and the cells are known as the prokaryotic cells, whereas eukaryotes are those organisms that has well defined nucleus, whose cells are known as eukaryotic cells.
Plant, animals and fungi belongs to the eukaryotes but bacteria belongs to the prokaryotes.
Bacterias are the unicellular micro-organism that contains a prokaryotic nucleus and are helpful in the fermentation process, but also can cause infection to the animals and human bodies.
Thus, the correct answer is option (C).
Bacteria are the organisms that are prokaryotes. Therefore option C is correct.
Prokaryotes are single-celled organisms that lack a nucleus and membrane-bound organelles. They are characterized by their simple cellular structure.
Plants, animals, and fungi are eukaryotes. Eukaryotes are organisms with complex cells that contain a nucleus and membrane-bound organelles.
Bacteria, on the other hand, are unicellular prokaryotic organisms. They have a simple cellular structure, lacking a nucleus and other membrane-bound organelles.
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b. either parent
c. the father
d. the mother
Answer: Option A) both parents
Explanation:
Every child receives a copy of gene each from both parents. Once, a baby receives two copies of diseased-gene from both parents who are carriers, the baby automatically get the disease
Answer:
Answer is A.
Explanation:
Here, one copy is inherited from their mother (through the egg) and the other from their father (through the sperm).