Answer:
See the answer below
Explanation:
<em>Hemophilia typically affects more males than females because the disorder is </em><em>X-linked </em><em>and </em><em>recessive</em><em>. </em>
<u>Females have two X chromosomes (XX) while males only have one X and one Y chromosome (XY). The two X chromosomes in females are capable of carrying alleles while the Y chromosome in males is hypothesized not able to carry alleles. </u>
Consequently, the two X chromosomes in females will both need to carry the recessive allele of hemophilia in order for any female to be affected for hemophilia while the males only need their single X chromosome to carry the recessive allele in order to be affected.
In order words, the presence of a single recessive allele is not enough for a female to be affected while it is more than enough for a male to be affected. Hence, more males are affected b hemophilia disorder than females.
Answer:
I no only no 21.the first one is used in photosynthesis the second is used in photosynthesis
Answer: The role of a species in its community.
Explanation: Niche, in ecology, all of the interactions of a species with the other members of its community, including competition, predation, parasitism, and mutualism.
Answer:
B- A cleft chin is due to a dominant allele
Explanation:
A husband and wife both having the phenotype for cleft chin and producing an offspring without a cleft chin, indicates heterozygousity in their genotype.
With the heterozygous genotype however, they both expressed the phenotype for cleft chin, indicating that the allele for cleft chin is dominant over the allele coding for normal chin.
Since both parents are heterozygous for cleft lip, the sequence of genotype in their offspring will be:
- 25% chance of having homozygous cleft chin
- 50% chance of having heterozygous cleft chin
- 25% chance of having homozygous normal chin
Because of the dominance of the cleft chin allele, both homozygous and heterozygous forms of the cleft chin allele, will be expressed in the offspring and only the offspring homozygous for normal chin will not express this allele.
Answer:
They are sexual
Explanation:
This is sexual because you need a mother cell and a father cell for this to happen.
