Answer:
Patau syndrome is caused by having cell in the body that has three copies of chromosome 13 instead of the usual two.
Edwards syndrome is caused by having a third copy of all or part of chromosome 18.
Trisomy X syndrome is caused by a malformation in egg or sperm formation.
Explanation:
The phenomenon where one has three members of a homologous chromosome is called trisomy. Such children are mentally deficient, have a slit eyed appearance and have low chances of surviving because of reduced resistance to infections.
When nondisjunction involves all chromosomes, the resulting gametes are diploid. Patau, Edward and Trisomy X syndromes are examples gene mutations caused by nondisjunction.
This will affect the rest of the food web, the animals that eat plants will now be in competition for food and most of the plant eating animals will die off, causing animals that eat animals to also be in competition due to the lack of animals
Answer:
Probability of Dimples and a cleft chin among their offspring = 1/4
Probability of no dimples and a non-cleft chin = 1/4
Explanation:
the allele for the dimple trait D is dominant over the allele for the non-dimple trait d.
the allele for the cleft chin trait C is dominant over the allele for the non-cleft chin trait c.
Mr. Smith has heterozygous alleles for both traits.
Mrs. Smith does not have dimples, nor does she have a cleft chin
Mr Smith DdCc x. ddcc
Probability of Dimples and a cleft chin among their offspring = Dd x dd = 1/2
Cc x cc = 1/2 = 1/2*1/2 = 1/4
Probability of no dimples and a non-cleft chin = Dd x dd = 1/2, Cc x cc = 1/2 = 1/2*1/2 = 1/4.
Explanation:
Plants do not need respiratory system because roots , stems, leaves of plants exchange gases for respiration separately. ... They don't have lungs to breathe so they don't need a respiratory system. They have stomata.
