15 Questions
What is the difference between oviparous and viviparous animals?
Oviparous animals lay eggs, while viviparous animals give birth directly to babies.
Why do dogs produce several puppies while humans usually produce only one child at a time?
Dogs produce more than one egg at a time, resulting in more puppies being born simultaneously. Humans usually produce one egg at a time, leading to the birth of one child at a time.
Under what circumstances can twins be born in humans?
Twins can be born in humans when two eggs are produced and fertilized by two sperms, or when a single zygote splits and forms two embryos.
List the functions of the jelly cover around the frog’s egg.
The jelly cover around the frog’s egg helps to keep the eggs together, acts as a protective covering to prevent damage, and protects the eggs from injury.
Why do frogs produce a large number of gametes?
Frogs produce a large number of gametes to increase the chances of fertilisation due to threats like being eaten by fish or washed out by wind and rain.
Explain cloning briefly.
Cloning is the production of an exact copy of an animal through asexual reproduction, where the nucleus of a body cell is transferred into an empty egg cell to develop into an identical organism.
Why is the young one of a frog called a larva and not a baby frog?
The young one of a frog is called a larva because frogs undergo incomplete metamorphosis where they have only larval and adult stages without a pupal stage.
What is the purpose of jelly in frog eggs?
Jelly in frog eggs serves a protective role by providing cushioning and insulation to the developing embryo, safeguarding it from external harm.
Discuss the successes and failures of animal cloning.
Animal cloning has seen successes in producing genetically identical organisms but has also faced challenges such as health issues in clones, low success rates, and ethical concerns.
What is the purpose of the jelly-like substance surrounding frog eggs?
The jelly-like substance protects the eggs from predators and provides structural support.
Why do many clones often die soon after birth?
Many clones often die due to genetic abnormalities and complications during the cloning process.
What was the significance of Dolly the sheep in the field of cloning?
Dolly the sheep was the first mammal cloned from an adult somatic cell, showcasing the potential of cloning technology.
How does the cloning process impact the genetic diversity of a population?
Cloning reduces genetic diversity by producing genetically identical individuals, which can be detrimental in the long run.
What challenges are associated with the process of cloning animals?
Challenges include high rates of failure, genetic abnormalities, and ethical concerns surrounding animal welfare.
Discuss one potential ethical dilemma related to animal cloning.
One ethical dilemma is the welfare of cloned animals, as they may suffer from health issues and reduced quality of life.
Learn about the groundbreaking cloning process that successfully created Dolly the sheep in 1996 at the Roslin Institute. Understand the key steps involved in the cloning process, from cell collection to nucleus insertion.
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