The Punnett square considers gamete combinations. These combinations will depend on parental alleles.
<h3>What is a Punnett square?</h3>
A Punnett square is a diagram used to estimate genotypic and phenotypic proportions in a given genetic cross.
The Punnett square has into account gamete combinations to estimate genetic proportions in a given cross.
For example, in presence of a recessive allele designed as 'a' in a parent
A a
A AA Aa
A AA Aa
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Answer:
Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
Explanation:
The last type of symmetry is the bilateral symmetry. Bilateral symmetry is when the body plan can be divided along a plane that splits the animal's body into right and left sides that are mirror images of each other. Let's look at this type of symmetry a little more.
The leaves of forest trees have adapted to cope with exceptionally high rainfall. Many tropical rainforest leaves have a drip tip. It is thought that these drip tips enable rain drops to run off quickly. Plants need to shed water to avoid growth of fungus and bacteria in the warm, wet tropical rainforest
Answer:
True
Explanation:
Hello!
In the human body, meiosis is the process by which specialized cells divide to form gametes (ovum in women and sperm in men).
Through the meiosis process, four haploid cells are obtained from a diploid cell. Haploid cells are those that have only one set of chromosomes.
In women, only one of the four haploid cells formed keeps all the organelles of the stem cell acquiring a large size (ovum).
In fertilization, a haploid sperm fertilizes a haploid egg giving rise to the zygote (diploid) that will give rise to a new aoganism.
When meiosis is not completed correctly the gamete may contain a duplicate (2 copies) of one or more chromosomes, in this case fertilization normally occurs but may give rise to:
-An unviable zygote.
-A viable zygote with a genetic disease due to a trisomy of one of its chromosomes (Dawn syndrome is an example with the trisomy of chromosome XXI).
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