Genetics questions | form four Biology

Pure breeding tall pea plants are crossed with pure breeading short pea plants. The resulting offspring (F1) are tall. Which term describe the F1 generation?

1. Heterozygous, with shortness dominant
2. Heterozygous, with tallest dominant
3. Homozygous dominant
4. Homozygous recessive
5. Heterozygous, with incomplete dominance

Answer / Solution

UNSOLVED

Katundu ia an ex-form four fellow and is blood group B heterozygous. Haambiliki who was to finish form four this year is blood group A heterozygous. She has a son Kaajali of blood group O whom she claims Katundu is the father. Katundu who used to abscond biology classes and know no genetics has has refuted parentage. Give an outline of information that will help Katundu realize that he is the legitimate father of Kaajali.

Answer / Solution

UNSOLVED

If a sickle-celled man marries a heterozygous normal woman, the chance that they will produce a sickle-celled child is
A. 25%
B. 50%
C. 75%
D. 100%.

Answer / Solution

UNSOLVED

A plant breeder discovered that black colour in bean seeds was expressed in a heterozygous state while white was expressed in a homozygous state only. Write down parental genotypes that could be crossed to give offspring that were

1. all black
2. all white
3. 50% black and 50% white
4. all heterozygous black.

Answer / Solution

UNSOLVED

What is a lethal gene?

Answer / Solution

UNSOLVED