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#Question id: 4608


What must be true of any organ described as vestigial?

#XL - S Microbiology
  1. It must be analogous to some feature in an ancestor.

  2. It must be homologous to some feature in an ancestor.

  3. It must be both homologous and analogous to some feature in an ancestor.

  4. It need be neither homologous nor analogous to some feature in an ancestor.

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TLS Online TPP Program

#Question id: 4733

#XL - R Botany

If a homozygous plant with red peppers is crossed with a homozygous plant with green peppers, all the F1 plants have red peppers. When the F1 are crossed with one another, the F2 are in a ratio of 9 red : 3 brown : 3 yellow : 1 green  due to

TLS Online TPP Program

#Question id: 4734

#XL - R Botany

If a homozygous plant with red peppers is crossed with a homozygous plant with green peppers, all the F1 plants have red peppers When the F1 are crossed with one another then produced following progeny Which of following interaction involved in gene to gene of peppers plant?

TLS Online TPP Program

#Question id: 4742

#XL - R Botany

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?

TLS Online TPP Program

#Question id: 4743

#XL - R Botany

Ectrodactyly is an autosomal dominant trait that causes missing middle fingers (lobster claw malformation). A grandfather and grandson both have ectrodactyly, but the intervening father has normal hands by x-ray. Which of the following terms applies to this family?

TLS Online TPP Program

#Question id: 4744

#XL - R Botany

Assume that long ear lobes in humans are an autosomal dominant trait that exhibits 50% penetrance. A person who is heterozygous for long ear lobes mates with a person who is homozygous for normal ear lobes. What is the probability that their first child will have long ear lobes.

TLS Online TPP Program

#Question id: 4747

#XL - R Botany

How does incomplete dominance differ from incomplete penetrance?