Answer: It can detect chemical cues produced by the predator Notonecta glauca.
Explanation:
The correct answer is: a. n+1, n+1, n-1, n-1
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during mitosis or meiosis. There are three forms of nondisjunction:
1. failure of a pair of homologous chromosomes to separate in meiosis I ,
2. failure of sister chromatids to separate during meiosis II, and
3. failure of sister chromatids to separate during mitosis.
As a consequence of nondisjunction abnormal chromosome numbers appears. If nondisjunction occurs during the meiosis I (anaphase I), this means that at least one pair of homologous chromosomes did not separate. The consequence is two cells that have an extra copy of one chromosome and two cells that lack that chromosome.
The given question is incorrect. The correct question is:
Which of the following is true about a plant with the genotype AABbcc?
a. It is heterozygous at two loci.
b. It is homozygous at two loci.
c. It is triploid.
d. It will not express the recessive c allele.
e. It has recessive alleles at three loci.
Answer:
b. It is homozygous at two loci.
Explanation:
When an organism has two identical alleles of a particular gene, it is said to be homozygous for that gene. The given genotype "AABbcc" has a dominant allele for "A" and the recessive allele for "c". It is homozygous for these two genes but is heterozygous with respect to "B". The presence of three complete sets of chromosomes makes the organisms triploid. The given genotype carries two alleles for each gene and therefore, it is diploid.
A medium. Like water or air or a brick wall.
