Leaving Cert Agricultural Science Genetics: Read the following paragraph abo

Question

Read the following paragraph about the study of genetics and match the words from the list below with the numbered spaces.

Much of the early work in genetics was carried out by Gregor Mendel (1822 – 1884) on the edible pea. In one experiment he crossed tall-stemmed plants (TT) with dwarf-stemmed plants (tt) and found that all the plants in the next generation were tall-stemmed. In modern genetics tall is said to be _______ 1 over dwarf. The trait which disappeared in the first filial generation (F1) is said to be _______ 2.
These plants (Tt) in the F1 generation are said to be _______ 3 because the two members of this pair of alleles are different. When two members of a pair of alleles are identical they are _______ 4 for that trait. The genetic make-up of the pea plants is known as the _______ 5 and the physical appearance is known as _______ 6.

The pig in the photograph shows the dominant characteristic of erect ears.

(i) A pure-breeding pig with erect ears (EE) was crossed with a pig with drooping ears (ee).

Copy the following into your answer book and complete the cross by filling in the spaces to show the possible gametes, genotype and phenotype.

The genotypes of the parents ____________ (EE) x (ee)
The gametes produced by each parent ____________ ( ) x ( )
The genotype of the offspring ____________ ( )
The phenotype of the offspring ____________ ( )

(ii) One of the offspring of the above cross is then crossed with another pure-breeding pig with erect ears.

Copy the following into your answer book and complete the cross by filling in the spaces to show the possible gametes, genotypes and phenotype.

The genotypes of the parents ____________ (EE) x ( )
The gametes produced by each parent ____________ ( ) x ( )
The genotypes of the offspring ____________ ( )
The phenotype of the offspring ____________ ( )

(c) Mitosis is one of the two types of cell division.
Name the other type of cell division.
(ii) The diagram shows the metaphase stage of mitosis.
Name the parts of the diagram labelled L and M.

Read the following paragraph about the study of genetics and match the words from the list below with the numbered spaces - Leaving Cert Agricultural Science - Question Question 1 - 2010

Worked Solution & Example Answer:Read the following paragraph about the study of genetics and match the words from the list below with the numbered spaces - Leaving Cert Agricultural Science - Question Question 1 - 2010

Fill in the blanks for the genetics paragraph

Copy the following into your answer book and complete the cross by filling in the spaces to show the possible gametes, genotype and phenotype.

Copy the following into your answer book and complete the cross by filling in the spaces to show the possible gametes, genotypes and phenotype.

Name the other type of cell division.

Name the parts of the diagram labelled L and M.

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