Which are vascular plants?

1 answer:

8 0

Vascular plants, also known as tracheophytes, form a large group of plants that are defined as those land plants that have lignified tissues for conducting water and minerals throughout the plant. They also have a specialized non-lignified tissue to conduct products of photosynthesis.

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If a heterozygous parent (AB/ab) is testcrossed to a homozygous recessive (ab/ab), what will the progeny phenotypic ratio be if

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Answer:

Phenotypic ratio 1:1:1:1

Explanation:

A test cross is a cross between an individual with heterozygous genotype and a homozygous recessive individual, in order to ascertain the actual genotype of the dominant parent i.e whether homozygous or heterozygous.

In this case, which is a dihybrid cross involving two genes A and B. The allele A is dominant over allele a, since it masks the expression in a heterozygous state. The same applies for allele B and b.

Therefore, allele A and B are dominant alleles while allele a and b are recessive alleles.

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