Tshego is deaf with the following genptype (dd). She marries Katlego, who is also deaf (dd) . If they have a child. Which of the following possibilities is likely:
1. Their child is also expected to be seaf and have a genotype of (dd)
2. Their child is likely to have normal hearing qith a genotype of (dd) (two recessive genes)
3 their child is expected to have normal hearing with a genotype of (DD) (two dominant genes)
4. Their child is also likely to he deaf and have a genotype of (DD) (two dominant genes)
The correct answer is 1. Their child is also expected to be deaf and have a genotype of (dd) since both Tshego and Katlego are deaf and have the genotype (dd).
Based on the given information that both Tshego and Katlego are deaf with a genotype of (dd), let's analyze the possibilities for their child:
1. It is possible for their child to be deaf with a genotype of (dd). This is because both Tshego and Katlego have two copies of the recessive gene for deafness, which they can pass on to their child.
2. It is unlikely for their child to have normal hearing with a genotype of (dd). In order for a person to have normal hearing, they would need at least one copy of the dominant gene. However, both Tshego and Katlego do not possess any dominant genes for hearing.
3. It is unlikely for their child to have normal hearing with a genotype of (DD). The dominant gene for normal hearing would need to be inherited from at least one of the parents. However, both Tshego and Katlego do not possess any dominant genes for hearing.
4. It is unlikely for their child to be deaf with a genotype of (DD). In order for a person to be deaf, they would need two copies of the recessive gene. However, both Tshego and Katlego do not possess any dominant genes for hearing.
Therefore, the most likely possibility is option 1: Their child is also expected to be deaf and have a genotype of (dd).