O / 2 pts Question 3 A bull might be a carrier of osteopetrosis (marble bone dis

Question

O / 2 pts Question 3 A bull might be a carrier of osteopetrosis (marble bone disease, assume two alleles in this locus), a recessive lethal condition. Twenty percent of all cows in the same heard are thought to be carriers of the osteopetrosis allele. Artificial insemination matings to randomly chosen cows have already produced 100 normal calves, and no homozygous recessive calves. What is the relationship between the alleles for this locus? epistasis genotype co-dominance . heterozygotes homozygotes additive dominance homologous

Explanation / Answer

Answer

In the given question bull is carrier and homozygous recessive is a lethal condition. Therefore osteoporosis gene is X linked.

Then, if carrier male mate with carrier cow (homozygous recessive is lethal,All died) the situation would be

YXo  X. XXo

then gamates.   Y. Xo   X. X Xo

F1. XY YXo   XXo.   

So, in this condition the alleles of a gene present only in one copy on the chromosomes this is heterozygotes.

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.