Answer:
Man' s genotype= Bb
Children's genotype= Bb, Bb and bb for the three children
Explanation:
The gene involved here is that coding for eye color in humans. The allele for brown eyes (B) is dominant over that of blue eyes (b) i.e. brown eyes allele (B) will mask the expression blue eyes allele (b) in an heterozygous state.
A brown-eyed man is crossed with a blue-eyed woman (bb). The woman will be homozygous recessive since the recessive trait can only be expressed in a homologous state. They produce 2 brown-eyed offsprings and 1 blue-eyed offspring.
Note that, for the man who possess the dominant trait (brown eyes), he can either possess a homozygous or heterozygous genotype. Since he produced a recessive phenotyped (blue eyes) offspring when crossed with a blue-eyed woman, it means he donated a recessive allele (b) which combined with that of the woman. Hence, the man has a heterozygous genotype (Bb).
Having known the man's genotype, a cross (see attached image) between Bb and bb will produce four possible offsprings; 2 will be heterozygous brown-eyed (Bb) while the other two will be homozygous blue-eyed (bb).
Since two of their children were brown-eyed, they will have a (Bb) genotype while the blue-eyed child will have a (bb) genotype.
Answer: A. Nervous tissue
Explanation:
The spinal cord, together with the brain, forms the central nervous system and the most important part of the body for the transmission of nerve impulses, that is, information for the functioning of the body. The spinal cord as well as the entire nervous system is made up of nerve cells, whose receptors, neurons, transmit vital information to the brain where they are processed, after which feedback is sent in the form of some kind of command from the brain what certain parts of the body should do, i.e. how to function. In this way, the complete functioning of the organism is regulated. How much to increase the work of a particular organ, glands, how much the heart needs to pump blood, how to move hands, legs, all this is regulated by information from the brain through nerve cells, neurons.
If nerve cell damage occurs, which can be a result of physical injury, or a disease that causes nerve cell disruption, then there is no way to send information to the brain and feedback from the brain, which causes paralysis of certain parts of the body, sometimes the whole body, dependent on the injury and the degree of damage to nerve cells, neurons.
Answer: they showed the body of an organism not the activities
Explanation: