Purebreed is where both parents are the same breed to produce an offspring of the same breed.
Answer:
(a) Simple reflex action response to external stimuli while Condition reflex action deals with learned or modified patterns of behaviour gained through experience. (b) Simple reflex action same in all members of a species while Condition reflex action different in members of a species.
Explanation:
Models are simplified representations of of different complex systems. They also help to study very small or large objects.
Option B, D and E.
Explanation:
Models are very simplified representations of complex systems and organs or structures which are prepared to study those systems by scientists and normal people easily. Many structures of human body like cells or some tissues are very small in structure or microscopic in nature. So studying them are very hard without specific instruments which are not always available. Thus models are made to easily study those structures by scientists and even normal people and students.
Answer:
a. There are different possible ways that homologous pairs might line up
c. Different alignments of homologous pairs will cause different combinations of alleles in gametes.
Explanation:
The law of independent assortment, proposed by Mendel, states that the alleles of one gene segregate into gametes independently of the alleles of another gene. This means that the segregation of one gene does not affect another. This law of independent assortment is evident during gamete formation in sexually-reproducing organisms know as meiosis. Specifically, in the Metaphase 1 stage of meiosis 1, homologous chromosomes (similar but non-identical chromosomes received from each parent) lines up at the metaphase plate (cell equator).
The lining up of chromosomes in this stage occurs randomly making it possible for chromosomes to align in different possible ways. The way/manner the chromosomes align at the equator determines which chromosome combination gets separated into which gamete. The homologous chromosomes are randomly distributed at the cell's equator before segregates into gametes. This random orientation enables the alleles of each gene on a chromosome to combine in different random ways, hence, allowing genetic diversity in the resulting gametes (sperm and egg) they get segregated into.
Answer:
Chronic bronchitis might lead to other diseases because it weakens your immune system and makes it easier to catch diseases and harder to fight them off.